diff --git a/src/frontend/src/components/errors/ClientError.tsx b/src/frontend/src/components/errors/ClientError.tsx
new file mode 100644
index 0000000000..85811ac736
--- /dev/null
+++ b/src/frontend/src/components/errors/ClientError.tsx
@@ -0,0 +1,28 @@
+import { t } from '@lingui/macro';
+
+import GenericErrorPage from './GenericErrorPage';
+import NotAuthenticated from './NotAuthenticated';
+import NotFound from './NotFound';
+import PermissionDenied from './PermissionDenied';
+
+export default function ClientError({ status }: { status?: number }) {
+  switch (status) {
+    case 401:
+      return <NotAuthenticated />;
+    case 403:
+      return <PermissionDenied />;
+    case 404:
+      return <NotFound />;
+    default:
+      break;
+  }
+
+  // Generic client error
+  return (
+    <GenericErrorPage
+      title={t`Client Error`}
+      message={t`Client error occurred`}
+      status={status}
+    />
+  );
+}
diff --git a/src/frontend/src/components/errors/GenericErrorPage.tsx b/src/frontend/src/components/errors/GenericErrorPage.tsx
new file mode 100644
index 0000000000..94405ba281
--- /dev/null
+++ b/src/frontend/src/components/errors/GenericErrorPage.tsx
@@ -0,0 +1,74 @@
+import { Trans } from '@lingui/macro';
+import {
+  ActionIcon,
+  Alert,
+  Button,
+  Card,
+  Center,
+  Container,
+  Divider,
+  Group,
+  Stack,
+  Text
+} from '@mantine/core';
+import { IconArrowBack, IconExclamationCircle } from '@tabler/icons-react';
+import { useNavigate } from 'react-router-dom';
+
+import { LanguageContext } from '../../contexts/LanguageContext';
+
+export default function ErrorPage({
+  title,
+  message,
+  status
+}: {
+  title: string;
+  message: string;
+  status?: number;
+  redirectMessage?: string;
+  redirectTarget?: string;
+}) {
+  const navigate = useNavigate();
+
+  return (
+    <LanguageContext>
+      <Center>
+        <Container w="md" miw={400}>
+          <Card withBorder shadow="xs" padding="xl" radius="sm">
+            <Card.Section p="lg">
+              <Group gap="xs">
+                <ActionIcon color="red" variant="transparent" size="xl">
+                  <IconExclamationCircle />
+                </ActionIcon>
+                <Text size="xl">{title}</Text>
+              </Group>
+            </Card.Section>
+            <Divider />
+            <Card.Section p="lg">
+              <Stack gap="md">
+                <Text size="lg">{message}</Text>
+                {status && (
+                  <Text>
+                    <Trans>Status Code</Trans>: {status}
+                  </Text>
+                )}
+              </Stack>
+            </Card.Section>
+            <Divider />
+            <Card.Section p="lg">
+              <Center>
+                <Button
+                  variant="outline"
+                  color="green"
+                  onClick={() => navigate('/')}
+                >
+                  <Trans>Return to the index page</Trans>
+                  <IconArrowBack />
+                </Button>
+              </Center>
+            </Card.Section>
+          </Card>
+        </Container>
+      </Center>
+    </LanguageContext>
+  );
+}
diff --git a/src/frontend/src/components/errors/NotAuthenticated.tsx b/src/frontend/src/components/errors/NotAuthenticated.tsx
new file mode 100644
index 0000000000..2d8920fd44
--- /dev/null
+++ b/src/frontend/src/components/errors/NotAuthenticated.tsx
@@ -0,0 +1,12 @@
+import { t } from '@lingui/macro';
+
+import GenericErrorPage from './GenericErrorPage';
+
+export default function NotAuthenticated() {
+  return (
+    <GenericErrorPage
+      title={t`Not Authenticated`}
+      message={t`You are not logged in.`}
+    />
+  );
+}
diff --git a/src/frontend/src/components/errors/NotFound.tsx b/src/frontend/src/components/errors/NotFound.tsx
new file mode 100644
index 0000000000..4d3f427f32
--- /dev/null
+++ b/src/frontend/src/components/errors/NotFound.tsx
@@ -0,0 +1,12 @@
+import { t } from '@lingui/macro';
+
+import GenericErrorPage from './GenericErrorPage';
+
+export default function NotFound() {
+  return (
+    <GenericErrorPage
+      title={t`Page Not Found`}
+      message={t`This page does not exist`}
+    />
+  );
+}
diff --git a/src/frontend/src/components/errors/PermissionDenied.tsx b/src/frontend/src/components/errors/PermissionDenied.tsx
new file mode 100644
index 0000000000..dd6e1e38fb
--- /dev/null
+++ b/src/frontend/src/components/errors/PermissionDenied.tsx
@@ -0,0 +1,12 @@
+import { t } from '@lingui/macro';
+
+import GenericErrorPage from './GenericErrorPage';
+
+export default function PermissionDenied() {
+  return (
+    <GenericErrorPage
+      title={t`Permission Denied`}
+      message={t`You do not have permission to view this page.`}
+    />
+  );
+}
diff --git a/src/frontend/src/components/errors/ServerError.tsx b/src/frontend/src/components/errors/ServerError.tsx
new file mode 100644
index 0000000000..4539645563
--- /dev/null
+++ b/src/frontend/src/components/errors/ServerError.tsx
@@ -0,0 +1,13 @@
+import { t } from '@lingui/macro';
+
+import GenericErrorPage from './GenericErrorPage';
+
+export default function ServerError({ status }: { status?: number }) {
+  return (
+    <GenericErrorPage
+      title={t`Server Error`}
+      message={t`A server error occurred`}
+      status={status}
+    />
+  );
+}
diff --git a/src/frontend/src/components/forms/ApiForm.tsx b/src/frontend/src/components/forms/ApiForm.tsx
index c9b660174e..a6385b7250 100644
--- a/src/frontend/src/components/forms/ApiForm.tsx
+++ b/src/frontend/src/components/forms/ApiForm.tsx
@@ -308,7 +308,7 @@ export function ApiForm({
 
         return response;
       } catch (error) {
-        console.error('Error fetching initial data:', error);
+        console.error('ERR: Error fetching initial data:', error);
         // Re-throw error to allow react-query to handle error
         throw error;
       }
diff --git a/src/frontend/src/components/nav/InstanceDetail.tsx b/src/frontend/src/components/nav/InstanceDetail.tsx
new file mode 100644
index 0000000000..3ee9a1cf51
--- /dev/null
+++ b/src/frontend/src/components/nav/InstanceDetail.tsx
@@ -0,0 +1,28 @@
+import { LoadingOverlay } from '@mantine/core';
+
+import ClientError from '../errors/ClientError';
+import ServerError from '../errors/ServerError';
+
+export default function InstanceDetail({
+  status,
+  loading,
+  children
+}: {
+  status: number;
+  loading: boolean;
+  children: React.ReactNode;
+}) {
+  if (loading) {
+    return <LoadingOverlay />;
+  }
+
+  if (status >= 500) {
+    return <ServerError status={status} />;
+  }
+
+  if (status >= 400) {
+    return <ClientError status={status} />;
+  }
+
+  return <>{children}</>;
+}
diff --git a/src/frontend/src/hooks/UseInstance.tsx b/src/frontend/src/hooks/UseInstance.tsx
index 88298cc1d0..e7c0c573b1 100644
--- a/src/frontend/src/hooks/UseInstance.tsx
+++ b/src/frontend/src/hooks/UseInstance.tsx
@@ -1,5 +1,5 @@
 import { useQuery } from '@tanstack/react-query';
-import { useCallback, useState } from 'react';
+import { useCallback, useMemo, useState } from 'react';
 
 import { api } from '../App';
 import { ApiEndpoints } from '../enums/ApiEndpoints';
@@ -39,6 +39,8 @@ export function useInstance<T = any>({
 }) {
   const [instance, setInstance] = useState<T | undefined>(defaultValue);
 
+  const [requestStatus, setRequestStatus] = useState<number>(0);
+
   const instanceQuery = useQuery<T>({
     queryKey: ['instance', endpoint, pk, params, pathParams],
     queryFn: async () => {
@@ -62,6 +64,7 @@ export function useInstance<T = any>({
           params: params
         })
         .then((response) => {
+          setRequestStatus(response.status);
           switch (response.status) {
             case 200:
               setInstance(response.data);
@@ -72,8 +75,9 @@ export function useInstance<T = any>({
           }
         })
         .catch((error) => {
+          setRequestStatus(error.response?.status || 0);
           setInstance(defaultValue);
-          console.error(`Error fetching instance ${url}:`, error);
+          console.error(`ERR: Error fetching instance ${url}:`, error);
 
           if (throwError) throw error;
 
@@ -89,5 +93,5 @@ export function useInstance<T = any>({
     instanceQuery.refetch();
   }, []);
 
-  return { instance, refreshInstance, instanceQuery };
+  return { instance, refreshInstance, instanceQuery, requestStatus };
 }
diff --git a/src/frontend/src/pages/ErrorPage.tsx b/src/frontend/src/pages/ErrorPage.tsx
index 624fb3bad6..db52eb7685 100644
--- a/src/frontend/src/pages/ErrorPage.tsx
+++ b/src/frontend/src/pages/ErrorPage.tsx
@@ -1,10 +1,9 @@
-import { Trans, t } from '@lingui/macro';
-import { Container, Text, Title } from '@mantine/core';
+import { t } from '@lingui/macro';
 import { useDocumentTitle } from '@mantine/hooks';
 import { useEffect, useState } from 'react';
 import { useRouteError } from 'react-router-dom';
 
-import { LanguageContext } from '../contexts/LanguageContext';
+import GenericErrorPage from '../components/errors/GenericErrorPage';
 import { ErrorResponse } from '../states/states';
 
 export default function ErrorPage() {
@@ -19,18 +18,9 @@ export default function ErrorPage() {
   }, [error]);
 
   return (
-    <LanguageContext>
-      <Container>
-        <Title>
-          <Trans>Error</Trans>
-        </Title>
-        <Text>
-          <Trans>Sorry, an unexpected error has occurred.</Trans>
-        </Text>
-        <Text>
-          <i>{error.statusText || error.message}</i>
-        </Text>
-      </Container>
-    </LanguageContext>
+    <GenericErrorPage
+      title={title}
+      message={t`An unexpected error has occurred`}
+    />
   );
 }
diff --git a/src/frontend/src/pages/Index/Settings/AdminCenter/Index.tsx b/src/frontend/src/pages/Index/Settings/AdminCenter/Index.tsx
index a5d16d530a..2b801566f1 100644
--- a/src/frontend/src/pages/Index/Settings/AdminCenter/Index.tsx
+++ b/src/frontend/src/pages/Index/Settings/AdminCenter/Index.tsx
@@ -17,11 +17,13 @@ import {
 } from '@tabler/icons-react';
 import { lazy, useMemo } from 'react';
 
+import PermissionDenied from '../../../../components/errors/PermissionDenied';
 import { PlaceholderPill } from '../../../../components/items/Placeholder';
 import { PanelGroup, PanelType } from '../../../../components/nav/PanelGroup';
 import { SettingsHeader } from '../../../../components/nav/SettingsHeader';
 import { GlobalSettingList } from '../../../../components/settings/SettingList';
 import { Loadable } from '../../../../functions/loading';
+import { useUserState } from '../../../../states/UserState';
 
 const ReportTemplatePanel = Loadable(
   lazy(() => import('./ReportTemplatePanel'))
@@ -74,6 +76,8 @@ const CurrencyTable = Loadable(
 );
 
 export default function AdminCenter() {
+  const user = useUserState();
+
   const adminCenterPanels: PanelType[] = useMemo(() => {
     return [
       {
@@ -187,19 +191,25 @@ export default function AdminCenter() {
   );
 
   return (
-    <Stack gap="xs">
-      <SettingsHeader
-        title={t`Admin Center`}
-        subtitle={t`Advanced Options`}
-        switch_link="/settings/system"
-        switch_text="System Settings"
-      />
-      <QuickAction />
-      <PanelGroup
-        pageKey="admin-center"
-        panels={adminCenterPanels}
-        collapsible={true}
-      />
-    </Stack>
+    <>
+      {user.isStaff() ? (
+        <Stack gap="xs">
+          <SettingsHeader
+            title={t`Admin Center`}
+            subtitle={t`Advanced Options`}
+            switch_link="/settings/system"
+            switch_text="System Settings"
+          />
+          <QuickAction />
+          <PanelGroup
+            pageKey="admin-center"
+            panels={adminCenterPanels}
+            collapsible={true}
+          />
+        </Stack>
+      ) : (
+        <PermissionDenied />
+      )}
+    </>
   );
 }
diff --git a/src/frontend/src/pages/Index/Settings/SystemSettings.tsx b/src/frontend/src/pages/Index/Settings/SystemSettings.tsx
index bd0ac884b8..9a25f715d6 100644
--- a/src/frontend/src/pages/Index/Settings/SystemSettings.tsx
+++ b/src/frontend/src/pages/Index/Settings/SystemSettings.tsx
@@ -19,11 +19,13 @@ import {
 } from '@tabler/icons-react';
 import { useMemo } from 'react';
 
+import PermissionDenied from '../../../components/errors/PermissionDenied';
 import { PlaceholderPanel } from '../../../components/items/Placeholder';
 import { PanelGroup, PanelType } from '../../../components/nav/PanelGroup';
 import { SettingsHeader } from '../../../components/nav/SettingsHeader';
 import { GlobalSettingList } from '../../../components/settings/SettingList';
 import { useServerApiState } from '../../../states/ApiState';
+import { useUserState } from '../../../states/UserState';
 
 /**
  * System settings page
@@ -295,19 +297,26 @@ export default function SystemSettings() {
       }
     ];
   }, []);
+
+  const user = useUserState();
+
   const [server] = useServerApiState((state) => [state.server]);
 
   return (
     <>
-      <Stack gap="xs">
-        <SettingsHeader
-          title={t`System Settings`}
-          subtitle={server.instance || ''}
-          switch_link="/settings/user"
-          switch_text={<Trans>Switch to User Setting</Trans>}
-        />
-        <PanelGroup pageKey="system-settings" panels={systemSettingsPanels} />
-      </Stack>
+      {user.isStaff() ? (
+        <Stack gap="xs">
+          <SettingsHeader
+            title={t`System Settings`}
+            subtitle={server.instance || ''}
+            switch_link="/settings/user"
+            switch_text={<Trans>Switch to User Setting</Trans>}
+          />
+          <PanelGroup pageKey="system-settings" panels={systemSettingsPanels} />
+        </Stack>
+      ) : (
+        <PermissionDenied />
+      )}
     </>
   );
 }
diff --git a/src/frontend/src/pages/NotFound.tsx b/src/frontend/src/pages/NotFound.tsx
deleted file mode 100644
index 53c1595a15..0000000000
--- a/src/frontend/src/pages/NotFound.tsx
+++ /dev/null
@@ -1,35 +0,0 @@
-import { Trans } from '@lingui/macro';
-import { Button, Center, Container, Stack, Text, Title } from '@mantine/core';
-import { IconArrowBack } from '@tabler/icons-react';
-import { useNavigate } from 'react-router-dom';
-
-import { LanguageContext } from '../contexts/LanguageContext';
-
-export default function NotFound() {
-  const navigate = useNavigate();
-
-  return (
-    <LanguageContext>
-      <Center mih="100vh">
-        <Container w="md" miw={400}>
-          <Stack>
-            <Title>
-              <Trans>Not Found</Trans>
-            </Title>
-            <Text>
-              <Trans>Sorry, this page is not known or was moved.</Trans>
-            </Text>
-            <Button
-              variant="outline"
-              color="green"
-              onClick={() => navigate('/')}
-            >
-              <Trans>Go to the start page</Trans>
-              <IconArrowBack />
-            </Button>
-          </Stack>
-        </Container>
-      </Center>
-    </LanguageContext>
-  );
-}
diff --git a/src/frontend/src/pages/build/BuildDetail.tsx b/src/frontend/src/pages/build/BuildDetail.tsx
index ec49228af8..28e9929b9c 100644
--- a/src/frontend/src/pages/build/BuildDetail.tsx
+++ b/src/frontend/src/pages/build/BuildDetail.tsx
@@ -1,5 +1,5 @@
 import { t } from '@lingui/macro';
-import { Grid, LoadingOverlay, Skeleton, Stack } from '@mantine/core';
+import { Grid, Skeleton, Stack } from '@mantine/core';
 import {
   IconClipboardCheck,
   IconClipboardList,
@@ -30,6 +30,7 @@ import {
   UnlinkBarcodeAction,
   ViewBarcodeAction
 } from '../../components/items/ActionDropdown';
+import InstanceDetail from '../../components/nav/InstanceDetail';
 import { PageDetail } from '../../components/nav/PageDetail';
 import { PanelGroup, PanelType } from '../../components/nav/PanelGroup';
 import { StatusRenderer } from '../../components/render/StatusRenderer';
@@ -61,7 +62,8 @@ export default function BuildDetail() {
   const {
     instance: build,
     refreshInstance,
-    instanceQuery
+    instanceQuery,
+    requestStatus
   } = useInstance({
     endpoint: ApiEndpoints.build_order_list,
     pk: id,
@@ -410,21 +412,22 @@ export default function BuildDetail() {
       {editBuild.modal}
       {duplicateBuild.modal}
       {cancelBuild.modal}
-      <Stack gap="xs">
-        <LoadingOverlay visible={instanceQuery.isFetching} />
-        <PageDetail
-          title={build.reference}
-          subtitle={build.title}
-          badges={buildBadges}
-          imageUrl={build.part_detail?.image ?? build.part_detail?.thumbnail}
-          breadcrumbs={[
-            { name: t`Build Orders`, url: '/build' },
-            { name: build.reference, url: `/build/${build.pk}` }
-          ]}
-          actions={buildActions}
-        />
-        <PanelGroup pageKey="build" panels={buildPanels} />
-      </Stack>
+      <InstanceDetail status={requestStatus} loading={instanceQuery.isFetching}>
+        <Stack gap="xs">
+          <PageDetail
+            title={build.reference}
+            subtitle={build.title}
+            badges={buildBadges}
+            imageUrl={build.part_detail?.image ?? build.part_detail?.thumbnail}
+            breadcrumbs={[
+              { name: t`Build Orders`, url: '/build' },
+              { name: build.reference, url: `/build/${build.pk}` }
+            ]}
+            actions={buildActions}
+          />
+          <PanelGroup pageKey="build" panels={buildPanels} />
+        </Stack>
+      </InstanceDetail>
     </>
   );
 }
diff --git a/src/frontend/src/pages/company/CompanyDetail.tsx b/src/frontend/src/pages/company/CompanyDetail.tsx
index d8102cecfb..3d542142bd 100644
--- a/src/frontend/src/pages/company/CompanyDetail.tsx
+++ b/src/frontend/src/pages/company/CompanyDetail.tsx
@@ -1,5 +1,5 @@
 import { t } from '@lingui/macro';
-import { Grid, LoadingOverlay, Skeleton, Stack } from '@mantine/core';
+import { Grid, Skeleton, Stack } from '@mantine/core';
 import {
   IconBuildingFactory2,
   IconBuildingWarehouse,
@@ -30,6 +30,7 @@ import {
   EditItemAction
 } from '../../components/items/ActionDropdown';
 import { Breadcrumb } from '../../components/nav/BreadcrumbList';
+import InstanceDetail from '../../components/nav/InstanceDetail';
 import { PageDetail } from '../../components/nav/PageDetail';
 import { PanelGroup, PanelType } from '../../components/nav/PanelGroup';
 import { ApiEndpoints } from '../../enums/ApiEndpoints';
@@ -66,7 +67,8 @@ export default function CompanyDetail(props: Readonly<CompanyDetailProps>) {
   const {
     instance: company,
     refreshInstance,
-    instanceQuery
+    instanceQuery,
+    requestStatus
   } = useInstance({
     endpoint: ApiEndpoints.company_list,
     pk: id,
@@ -320,18 +322,19 @@ export default function CompanyDetail(props: Readonly<CompanyDetailProps>) {
   return (
     <>
       {editCompany.modal}
-      <Stack gap="xs">
-        <LoadingOverlay visible={instanceQuery.isFetching} />
-        <PageDetail
-          title={t`Company` + `: ${company.name}`}
-          subtitle={company.description}
-          actions={companyActions}
-          imageUrl={company.image}
-          breadcrumbs={props.breadcrumbs}
-          badges={badges}
-        />
-        <PanelGroup pageKey="company" panels={companyPanels} />
-      </Stack>
+      <InstanceDetail status={requestStatus} loading={instanceQuery.isFetching}>
+        <Stack gap="xs">
+          <PageDetail
+            title={t`Company` + `: ${company.name}`}
+            subtitle={company.description}
+            actions={companyActions}
+            imageUrl={company.image}
+            breadcrumbs={props.breadcrumbs}
+            badges={badges}
+          />
+          <PanelGroup pageKey="company" panels={companyPanels} />
+        </Stack>
+      </InstanceDetail>
     </>
   );
 }
diff --git a/src/frontend/src/pages/company/ManufacturerPartDetail.tsx b/src/frontend/src/pages/company/ManufacturerPartDetail.tsx
index 7a145ad9b7..49a8681064 100644
--- a/src/frontend/src/pages/company/ManufacturerPartDetail.tsx
+++ b/src/frontend/src/pages/company/ManufacturerPartDetail.tsx
@@ -1,5 +1,5 @@
 import { t } from '@lingui/macro';
-import { Grid, LoadingOverlay, Skeleton, Stack } from '@mantine/core';
+import { Grid, Skeleton, Stack } from '@mantine/core';
 import {
   IconBuildingWarehouse,
   IconDots,
@@ -20,6 +20,7 @@ import {
   DuplicateItemAction,
   EditItemAction
 } from '../../components/items/ActionDropdown';
+import InstanceDetail from '../../components/nav/InstanceDetail';
 import { PageDetail } from '../../components/nav/PageDetail';
 import { PanelGroup, PanelType } from '../../components/nav/PanelGroup';
 import { ApiEndpoints } from '../../enums/ApiEndpoints';
@@ -44,7 +45,8 @@ export default function ManufacturerPartDetail() {
   const {
     instance: manufacturerPart,
     instanceQuery,
-    refreshInstance
+    refreshInstance,
+    requestStatus
   } = useInstance({
     endpoint: ApiEndpoints.manufacturer_part_list,
     pk: id,
@@ -244,17 +246,18 @@ export default function ManufacturerPartDetail() {
   return (
     <>
       {editManufacturerPart.modal}
-      <Stack gap="xs">
-        <LoadingOverlay visible={instanceQuery.isFetching} />
-        <PageDetail
-          title={t`ManufacturerPart`}
-          subtitle={`${manufacturerPart.MPN} - ${manufacturerPart.part_detail?.name}`}
-          breadcrumbs={breadcrumbs}
-          actions={manufacturerPartActions}
-          imageUrl={manufacturerPart?.part_detail?.thumbnail}
-        />
-        <PanelGroup pageKey="manufacturerpart" panels={panels} />
-      </Stack>
+      <InstanceDetail status={requestStatus} loading={instanceQuery.isFetching}>
+        <Stack gap="xs">
+          <PageDetail
+            title={t`ManufacturerPart`}
+            subtitle={`${manufacturerPart.MPN} - ${manufacturerPart.part_detail?.name}`}
+            breadcrumbs={breadcrumbs}
+            actions={manufacturerPartActions}
+            imageUrl={manufacturerPart?.part_detail?.thumbnail}
+          />
+          <PanelGroup pageKey="manufacturerpart" panels={panels} />
+        </Stack>
+      </InstanceDetail>
     </>
   );
 }
diff --git a/src/frontend/src/pages/company/SupplierPartDetail.tsx b/src/frontend/src/pages/company/SupplierPartDetail.tsx
index bef8168c48..d6e917e21e 100644
--- a/src/frontend/src/pages/company/SupplierPartDetail.tsx
+++ b/src/frontend/src/pages/company/SupplierPartDetail.tsx
@@ -1,5 +1,5 @@
 import { t } from '@lingui/macro';
-import { Grid, LoadingOverlay, Skeleton, Stack } from '@mantine/core';
+import { Grid, Skeleton, Stack } from '@mantine/core';
 import {
   IconCurrencyDollar,
   IconDots,
@@ -21,6 +21,7 @@ import {
   DuplicateItemAction,
   EditItemAction
 } from '../../components/items/ActionDropdown';
+import InstanceDetail from '../../components/nav/InstanceDetail';
 import { PageDetail } from '../../components/nav/PageDetail';
 import { PanelGroup, PanelType } from '../../components/nav/PanelGroup';
 import { ApiEndpoints } from '../../enums/ApiEndpoints';
@@ -46,7 +47,8 @@ export default function SupplierPartDetail() {
   const {
     instance: supplierPart,
     instanceQuery,
-    refreshInstance
+    refreshInstance,
+    requestStatus
   } = useInstance({
     endpoint: ApiEndpoints.supplier_part_list,
     pk: id,
@@ -312,18 +314,19 @@ export default function SupplierPartDetail() {
   return (
     <>
       {editSuppliertPart.modal}
-      <Stack gap="xs">
-        <LoadingOverlay visible={instanceQuery.isFetching} />
-        <PageDetail
-          title={t`Supplier Part`}
-          subtitle={`${supplierPart.SKU} - ${supplierPart?.part_detail?.name}`}
-          breadcrumbs={breadcrumbs}
-          badges={badges}
-          actions={supplierPartActions}
-          imageUrl={supplierPart?.part_detail?.thumbnail}
-        />
-        <PanelGroup pageKey="supplierpart" panels={panels} />
-      </Stack>
+      <InstanceDetail status={requestStatus} loading={instanceQuery.isFetching}>
+        <Stack gap="xs">
+          <PageDetail
+            title={t`Supplier Part`}
+            subtitle={`${supplierPart.SKU} - ${supplierPart?.part_detail?.name}`}
+            breadcrumbs={breadcrumbs}
+            badges={badges}
+            actions={supplierPartActions}
+            imageUrl={supplierPart?.part_detail?.thumbnail}
+          />
+          <PanelGroup pageKey="supplierpart" panels={panels} />
+        </Stack>
+      </InstanceDetail>
     </>
   );
 }
diff --git a/src/frontend/src/pages/part/CategoryDetail.tsx b/src/frontend/src/pages/part/CategoryDetail.tsx
index a94999e396..2a5dca6661 100644
--- a/src/frontend/src/pages/part/CategoryDetail.tsx
+++ b/src/frontend/src/pages/part/CategoryDetail.tsx
@@ -18,6 +18,7 @@ import {
   DeleteItemAction,
   EditItemAction
 } from '../../components/items/ActionDropdown';
+import InstanceDetail from '../../components/nav/InstanceDetail';
 import NavigationTree from '../../components/nav/NavigationTree';
 import { PageDetail } from '../../components/nav/PageDetail';
 import { PanelGroup, PanelType } from '../../components/nav/PanelGroup';
@@ -56,7 +57,8 @@ export default function CategoryDetail({}: {}) {
   const {
     instance: category,
     refreshInstance,
-    instanceQuery
+    instanceQuery,
+    requestStatus
   } = useInstance({
     endpoint: ApiEndpoints.category_list,
     hasPrimaryKey: true,
@@ -275,29 +277,34 @@ export default function CategoryDetail({}: {}) {
     <>
       {editCategory.modal}
       {deleteCategory.modal}
-      <Stack gap="xs">
-        <LoadingOverlay visible={instanceQuery.isFetching} />
-        <NavigationTree
-          modelType={ModelType.partcategory}
-          title={t`Part Categories`}
-          endpoint={ApiEndpoints.category_tree}
-          opened={treeOpen}
-          onClose={() => {
-            setTreeOpen(false);
-          }}
-          selectedId={category?.pk}
-        />
-        <PageDetail
-          title={t`Part Category`}
-          subtitle={category?.name}
-          breadcrumbs={breadcrumbs}
-          breadcrumbAction={() => {
-            setTreeOpen(true);
-          }}
-          actions={categoryActions}
-        />
-        <PanelGroup pageKey="partcategory" panels={categoryPanels} />
-      </Stack>
+      <InstanceDetail
+        status={requestStatus}
+        loading={id ? instanceQuery.isFetching : false}
+      >
+        <Stack gap="xs">
+          <LoadingOverlay visible={instanceQuery.isFetching} />
+          <NavigationTree
+            modelType={ModelType.partcategory}
+            title={t`Part Categories`}
+            endpoint={ApiEndpoints.category_tree}
+            opened={treeOpen}
+            onClose={() => {
+              setTreeOpen(false);
+            }}
+            selectedId={category?.pk}
+          />
+          <PageDetail
+            title={t`Part Category`}
+            subtitle={category?.name}
+            breadcrumbs={breadcrumbs}
+            breadcrumbAction={() => {
+              setTreeOpen(true);
+            }}
+            actions={categoryActions}
+          />
+          <PanelGroup pageKey="partcategory" panels={categoryPanels} />
+        </Stack>
+      </InstanceDetail>
     </>
   );
 }
diff --git a/src/frontend/src/pages/part/PartDetail.tsx b/src/frontend/src/pages/part/PartDetail.tsx
index 3eafa7b23f..838d304b11 100644
--- a/src/frontend/src/pages/part/PartDetail.tsx
+++ b/src/frontend/src/pages/part/PartDetail.tsx
@@ -1,13 +1,5 @@
 import { t } from '@lingui/macro';
-import {
-  Alert,
-  Divider,
-  Grid,
-  LoadingOverlay,
-  Skeleton,
-  Stack,
-  Table
-} from '@mantine/core';
+import { Alert, Grid, Skeleton, Stack, Table } from '@mantine/core';
 import {
   IconBookmarks,
   IconBuilding,
@@ -31,7 +23,7 @@ import {
   IconVersions
 } from '@tabler/icons-react';
 import { useSuspenseQuery } from '@tanstack/react-query';
-import { ReactNode, useMemo, useState } from 'react';
+import { ReactNode, useEffect, useMemo, useState } from 'react';
 import { useNavigate, useParams } from 'react-router-dom';
 
 import { api } from '../../App';
@@ -54,6 +46,7 @@ import {
   ViewBarcodeAction
 } from '../../components/items/ActionDropdown';
 import { PlaceholderPanel } from '../../components/items/Placeholder';
+import InstanceDetail from '../../components/nav/InstanceDetail';
 import NavigationTree from '../../components/nav/NavigationTree';
 import { PageDetail } from '../../components/nav/PageDetail';
 import { PanelGroup, PanelType } from '../../components/nav/PanelGroup';
@@ -105,7 +98,8 @@ export default function PartDetail() {
   const {
     instance: part,
     refreshInstance,
-    instanceQuery
+    instanceQuery,
+    requestStatus
   } = useInstance({
     endpoint: ApiEndpoints.part_list,
     pk: id,
@@ -821,33 +815,34 @@ export default function PartDetail() {
       {duplicatePart.modal}
       {editPart.modal}
       {deletePart.modal}
-      <Stack gap="xs">
-        <LoadingOverlay visible={instanceQuery.isFetching} />
-        <NavigationTree
-          title={t`Part Categories`}
-          modelType={ModelType.partcategory}
-          endpoint={ApiEndpoints.category_tree}
-          opened={treeOpen}
-          onClose={() => {
-            setTreeOpen(false);
-          }}
-          selectedId={part?.category}
-        />
-        <PageDetail
-          title={t`Part` + ': ' + part.full_name}
-          subtitle={part.description}
-          imageUrl={part.image}
-          badges={badges}
-          breadcrumbs={breadcrumbs}
-          breadcrumbAction={() => {
-            setTreeOpen(true);
-          }}
-          actions={partActions}
-        />
-        <PanelGroup pageKey="part" panels={partPanels} />
-        {transferStockItems.modal}
-        {countStockItems.modal}
-      </Stack>
+      <InstanceDetail status={requestStatus} loading={instanceQuery.isFetching}>
+        <Stack gap="xs">
+          <NavigationTree
+            title={t`Part Categories`}
+            modelType={ModelType.partcategory}
+            endpoint={ApiEndpoints.category_tree}
+            opened={treeOpen}
+            onClose={() => {
+              setTreeOpen(false);
+            }}
+            selectedId={part?.category}
+          />
+          <PageDetail
+            title={t`Part` + ': ' + part.full_name}
+            subtitle={part.description}
+            imageUrl={part.image}
+            badges={badges}
+            breadcrumbs={breadcrumbs}
+            breadcrumbAction={() => {
+              setTreeOpen(true);
+            }}
+            actions={partActions}
+          />
+          <PanelGroup pageKey="part" panels={partPanels} />
+          {transferStockItems.modal}
+          {countStockItems.modal}
+        </Stack>
+      </InstanceDetail>
     </>
   );
 }
diff --git a/src/frontend/src/pages/purchasing/PurchaseOrderDetail.tsx b/src/frontend/src/pages/purchasing/PurchaseOrderDetail.tsx
index fe79915276..9fab1e1ccf 100644
--- a/src/frontend/src/pages/purchasing/PurchaseOrderDetail.tsx
+++ b/src/frontend/src/pages/purchasing/PurchaseOrderDetail.tsx
@@ -1,5 +1,5 @@
 import { t } from '@lingui/macro';
-import { Grid, LoadingOverlay, Skeleton, Stack } from '@mantine/core';
+import { Grid, Skeleton, Stack } from '@mantine/core';
 import {
   IconDots,
   IconInfoCircle,
@@ -27,6 +27,7 @@ import {
   UnlinkBarcodeAction,
   ViewBarcodeAction
 } from '../../components/items/ActionDropdown';
+import InstanceDetail from '../../components/nav/InstanceDetail';
 import { PageDetail } from '../../components/nav/PageDetail';
 import { PanelGroup, PanelType } from '../../components/nav/PanelGroup';
 import { StatusRenderer } from '../../components/render/StatusRenderer';
@@ -40,7 +41,6 @@ import {
   useEditApiFormModal
 } from '../../hooks/UseForm';
 import { useInstance } from '../../hooks/UseInstance';
-import { apiUrl } from '../../states/ApiState';
 import { useUserState } from '../../states/UserState';
 import { AttachmentTable } from '../../tables/general/AttachmentTable';
 import { PurchaseOrderLineItemTable } from '../../tables/purchasing/PurchaseOrderLineItemTable';
@@ -57,7 +57,8 @@ export default function PurchaseOrderDetail() {
   const {
     instance: order,
     instanceQuery,
-    refreshInstance
+    refreshInstance,
+    requestStatus
   } = useInstance({
     endpoint: ApiEndpoints.purchase_order_list,
     pk: id,
@@ -355,18 +356,19 @@ export default function PurchaseOrderDetail() {
   return (
     <>
       {editPurchaseOrder.modal}
-      <Stack gap="xs">
-        <LoadingOverlay visible={instanceQuery.isFetching} />
-        <PageDetail
-          title={t`Purchase Order` + `: ${order.reference}`}
-          subtitle={order.description}
-          imageUrl={order.supplier_detail?.image}
-          breadcrumbs={[{ name: t`Purchasing`, url: '/purchasing/' }]}
-          actions={poActions}
-          badges={orderBadges}
-        />
-        <PanelGroup pageKey="purchaseorder" panels={orderPanels} />
-      </Stack>
+      <InstanceDetail status={requestStatus} loading={instanceQuery.isFetching}>
+        <Stack gap="xs">
+          <PageDetail
+            title={t`Purchase Order` + `: ${order.reference}`}
+            subtitle={order.description}
+            imageUrl={order.supplier_detail?.image}
+            breadcrumbs={[{ name: t`Purchasing`, url: '/purchasing/' }]}
+            actions={poActions}
+            badges={orderBadges}
+          />
+          <PanelGroup pageKey="purchaseorder" panels={orderPanels} />
+        </Stack>
+      </InstanceDetail>
     </>
   );
 }
diff --git a/src/frontend/src/pages/sales/ReturnOrderDetail.tsx b/src/frontend/src/pages/sales/ReturnOrderDetail.tsx
index 4d62470f1a..c65f778faa 100644
--- a/src/frontend/src/pages/sales/ReturnOrderDetail.tsx
+++ b/src/frontend/src/pages/sales/ReturnOrderDetail.tsx
@@ -1,5 +1,5 @@
 import { t } from '@lingui/macro';
-import { Grid, LoadingOverlay, Skeleton, Stack } from '@mantine/core';
+import { Grid, Skeleton, Stack } from '@mantine/core';
 import {
   IconDots,
   IconInfoCircle,
@@ -23,6 +23,7 @@ import {
   EditItemAction
 } from '../../components/items/ActionDropdown';
 import { PlaceholderPanel } from '../../components/items/Placeholder';
+import InstanceDetail from '../../components/nav/InstanceDetail';
 import { PageDetail } from '../../components/nav/PageDetail';
 import { PanelGroup, PanelType } from '../../components/nav/PanelGroup';
 import { StatusRenderer } from '../../components/render/StatusRenderer';
@@ -36,7 +37,6 @@ import {
   useEditApiFormModal
 } from '../../hooks/UseForm';
 import { useInstance } from '../../hooks/UseInstance';
-import { apiUrl } from '../../states/ApiState';
 import { useUserState } from '../../states/UserState';
 import { AttachmentTable } from '../../tables/general/AttachmentTable';
 
@@ -51,7 +51,8 @@ export default function ReturnOrderDetail() {
   const {
     instance: order,
     instanceQuery,
-    refreshInstance
+    refreshInstance,
+    requestStatus
   } = useInstance({
     endpoint: ApiEndpoints.return_order_list,
     pk: id,
@@ -320,18 +321,19 @@ export default function ReturnOrderDetail() {
     <>
       {editReturnOrder.modal}
       {duplicateReturnOrder.modal}
-      <Stack gap="xs">
-        <LoadingOverlay visible={instanceQuery.isFetching} />
-        <PageDetail
-          title={t`Return Order` + `: ${order.reference}`}
-          subtitle={order.description}
-          imageUrl={order.customer_detail?.image}
-          badges={orderBadges}
-          actions={orderActions}
-          breadcrumbs={[{ name: t`Sales`, url: '/sales/' }]}
-        />
-        <PanelGroup pageKey="returnorder" panels={orderPanels} />
-      </Stack>
+      <InstanceDetail status={requestStatus} loading={instanceQuery.isFetching}>
+        <Stack gap="xs">
+          <PageDetail
+            title={t`Return Order` + `: ${order.reference}`}
+            subtitle={order.description}
+            imageUrl={order.customer_detail?.image}
+            badges={orderBadges}
+            actions={orderActions}
+            breadcrumbs={[{ name: t`Sales`, url: '/sales/' }]}
+          />
+          <PanelGroup pageKey="returnorder" panels={orderPanels} />
+        </Stack>
+      </InstanceDetail>
     </>
   );
 }
diff --git a/src/frontend/src/pages/sales/SalesOrderDetail.tsx b/src/frontend/src/pages/sales/SalesOrderDetail.tsx
index 12b31bb9e6..2222f7cbd2 100644
--- a/src/frontend/src/pages/sales/SalesOrderDetail.tsx
+++ b/src/frontend/src/pages/sales/SalesOrderDetail.tsx
@@ -1,5 +1,5 @@
 import { t } from '@lingui/macro';
-import { Grid, LoadingOverlay, Skeleton, Stack } from '@mantine/core';
+import { Grid, Skeleton, Stack } from '@mantine/core';
 import {
   IconDots,
   IconInfoCircle,
@@ -26,6 +26,7 @@ import {
   EditItemAction
 } from '../../components/items/ActionDropdown';
 import { PlaceholderPanel } from '../../components/items/Placeholder';
+import InstanceDetail from '../../components/nav/InstanceDetail';
 import { PageDetail } from '../../components/nav/PageDetail';
 import { PanelGroup, PanelType } from '../../components/nav/PanelGroup';
 import { StatusRenderer } from '../../components/render/StatusRenderer';
@@ -39,7 +40,6 @@ import {
   useEditApiFormModal
 } from '../../hooks/UseForm';
 import { useInstance } from '../../hooks/UseInstance';
-import { apiUrl } from '../../states/ApiState';
 import { useUserState } from '../../states/UserState';
 import { BuildOrderTable } from '../../tables/build/BuildOrderTable';
 import { AttachmentTable } from '../../tables/general/AttachmentTable';
@@ -55,7 +55,8 @@ export default function SalesOrderDetail() {
   const {
     instance: order,
     instanceQuery,
-    refreshInstance
+    refreshInstance,
+    requestStatus
   } = useInstance({
     endpoint: ApiEndpoints.sales_order_list,
     pk: id,
@@ -344,18 +345,19 @@ export default function SalesOrderDetail() {
   return (
     <>
       {editSalesOrder.modal}
-      <Stack gap="xs">
-        <LoadingOverlay visible={instanceQuery.isFetching} />
-        <PageDetail
-          title={t`Sales Order` + `: ${order.reference}`}
-          subtitle={order.description}
-          imageUrl={order.customer_detail?.image}
-          badges={orderBadges}
-          actions={soActions}
-          breadcrumbs={[{ name: t`Sales`, url: '/sales/' }]}
-        />
-        <PanelGroup pageKey="salesorder" panels={orderPanels} />
-      </Stack>
+      <InstanceDetail status={requestStatus} loading={instanceQuery.isFetching}>
+        <Stack gap="xs">
+          <PageDetail
+            title={t`Sales Order` + `: ${order.reference}`}
+            subtitle={order.description}
+            imageUrl={order.customer_detail?.image}
+            badges={orderBadges}
+            actions={soActions}
+            breadcrumbs={[{ name: t`Sales`, url: '/sales/' }]}
+          />
+          <PanelGroup pageKey="salesorder" panels={orderPanels} />
+        </Stack>
+      </InstanceDetail>
     </>
   );
 }
diff --git a/src/frontend/src/pages/stock/LocationDetail.tsx b/src/frontend/src/pages/stock/LocationDetail.tsx
index 744e782e5b..4ad6330286 100644
--- a/src/frontend/src/pages/stock/LocationDetail.tsx
+++ b/src/frontend/src/pages/stock/LocationDetail.tsx
@@ -1,5 +1,5 @@
 import { t } from '@lingui/macro';
-import { LoadingOverlay, Skeleton, Stack, Text } from '@mantine/core';
+import { Skeleton, Stack, Text } from '@mantine/core';
 import {
   IconDots,
   IconInfoCircle,
@@ -23,6 +23,7 @@ import {
   UnlinkBarcodeAction,
   ViewBarcodeAction
 } from '../../components/items/ActionDropdown';
+import InstanceDetail from '../../components/nav/InstanceDetail';
 import NavigationTree from '../../components/nav/NavigationTree';
 import { PageDetail } from '../../components/nav/PageDetail';
 import { PanelGroup, PanelType } from '../../components/nav/PanelGroup';
@@ -63,7 +64,8 @@ export default function Stock() {
   const {
     instance: location,
     refreshInstance,
-    instanceQuery
+    instanceQuery,
+    requestStatus
   } = useInstance({
     endpoint: ApiEndpoints.stock_location_list,
     hasPrimaryKey: true,
@@ -355,29 +357,33 @@ export default function Stock() {
     <>
       {editLocation.modal}
       {deleteLocation.modal}
-      <Stack>
-        <LoadingOverlay visible={instanceQuery.isFetching} />
-        <NavigationTree
-          title={t`Stock Locations`}
-          modelType={ModelType.stocklocation}
-          endpoint={ApiEndpoints.stock_location_tree}
-          opened={treeOpen}
-          onClose={() => setTreeOpen(false)}
-          selectedId={location?.pk}
-        />
-        <PageDetail
-          title={t`Stock Items`}
-          subtitle={location?.name}
-          actions={locationActions}
-          breadcrumbs={breadcrumbs}
-          breadcrumbAction={() => {
-            setTreeOpen(true);
-          }}
-        />
-        <PanelGroup pageKey="stocklocation" panels={locationPanels} />
-        {transferStockItems.modal}
-        {countStockItems.modal}
-      </Stack>
+      <InstanceDetail
+        status={requestStatus}
+        loading={id ? instanceQuery.isFetching : false}
+      >
+        <Stack>
+          <NavigationTree
+            title={t`Stock Locations`}
+            modelType={ModelType.stocklocation}
+            endpoint={ApiEndpoints.stock_location_tree}
+            opened={treeOpen}
+            onClose={() => setTreeOpen(false)}
+            selectedId={location?.pk}
+          />
+          <PageDetail
+            title={t`Stock Items`}
+            subtitle={location?.name}
+            actions={locationActions}
+            breadcrumbs={breadcrumbs}
+            breadcrumbAction={() => {
+              setTreeOpen(true);
+            }}
+          />
+          <PanelGroup pageKey="stocklocation" panels={locationPanels} />
+          {transferStockItems.modal}
+          {countStockItems.modal}
+        </Stack>
+      </InstanceDetail>
     </>
   );
 }
diff --git a/src/frontend/src/pages/stock/StockDetail.tsx b/src/frontend/src/pages/stock/StockDetail.tsx
index 14face5201..c07814af48 100644
--- a/src/frontend/src/pages/stock/StockDetail.tsx
+++ b/src/frontend/src/pages/stock/StockDetail.tsx
@@ -1,5 +1,5 @@
 import { t } from '@lingui/macro';
-import { Grid, LoadingOverlay, Skeleton, Stack } from '@mantine/core';
+import { Grid, Skeleton, Stack } from '@mantine/core';
 import {
   IconBookmark,
   IconBoxPadding,
@@ -33,6 +33,7 @@ import {
   ViewBarcodeAction
 } from '../../components/items/ActionDropdown';
 import { PlaceholderPanel } from '../../components/items/Placeholder';
+import InstanceDetail from '../../components/nav/InstanceDetail';
 import NavigationTree from '../../components/nav/NavigationTree';
 import { PageDetail } from '../../components/nav/PageDetail';
 import { PanelGroup, PanelType } from '../../components/nav/PanelGroup';
@@ -76,7 +77,8 @@ export default function StockDetail() {
   const {
     instance: stockitem,
     refreshInstance,
-    instanceQuery
+    instanceQuery,
+    requestStatus
   } = useInstance({
     endpoint: ApiEndpoints.stock_item_list,
     pk: id,
@@ -548,35 +550,36 @@ export default function StockDetail() {
   }, [stockitem, instanceQuery]);
 
   return (
-    <Stack>
-      <LoadingOverlay visible={instanceQuery.isFetching} />
-      <NavigationTree
-        title={t`Stock Locations`}
-        modelType={ModelType.stocklocation}
-        endpoint={ApiEndpoints.stock_location_tree}
-        opened={treeOpen}
-        onClose={() => setTreeOpen(false)}
-        selectedId={stockitem?.location}
-      />
-      <PageDetail
-        title={t`Stock Item`}
-        subtitle={stockitem.part_detail?.full_name}
-        imageUrl={stockitem.part_detail?.thumbnail}
-        badges={stockBadges}
-        breadcrumbs={breadcrumbs}
-        breadcrumbAction={() => {
-          setTreeOpen(true);
-        }}
-        actions={stockActions}
-      />
-      <PanelGroup pageKey="stockitem" panels={stockPanels} />
-      {editStockItem.modal}
-      {duplicateStockItem.modal}
-      {deleteStockItem.modal}
-      {countStockItem.modal}
-      {addStockItem.modal}
-      {removeStockItem.modal}
-      {transferStockItem.modal}
-    </Stack>
+    <InstanceDetail status={requestStatus} loading={instanceQuery.isFetching}>
+      <Stack>
+        <NavigationTree
+          title={t`Stock Locations`}
+          modelType={ModelType.stocklocation}
+          endpoint={ApiEndpoints.stock_location_tree}
+          opened={treeOpen}
+          onClose={() => setTreeOpen(false)}
+          selectedId={stockitem?.location}
+        />
+        <PageDetail
+          title={t`Stock Item`}
+          subtitle={stockitem.part_detail?.full_name}
+          imageUrl={stockitem.part_detail?.thumbnail}
+          badges={stockBadges}
+          breadcrumbs={breadcrumbs}
+          breadcrumbAction={() => {
+            setTreeOpen(true);
+          }}
+          actions={stockActions}
+        />
+        <PanelGroup pageKey="stockitem" panels={stockPanels} />
+        {editStockItem.modal}
+        {duplicateStockItem.modal}
+        {deleteStockItem.modal}
+        {countStockItem.modal}
+        {addStockItem.modal}
+        {removeStockItem.modal}
+        {transferStockItem.modal}
+      </Stack>
+    </InstanceDetail>
   );
 }
diff --git a/src/frontend/src/router.tsx b/src/frontend/src/router.tsx
index a80a0fdce1..b7a040458b 100644
--- a/src/frontend/src/router.tsx
+++ b/src/frontend/src/router.tsx
@@ -101,7 +101,9 @@ export const AdminCenter = Loadable(
   lazy(() => import('./pages/Index/Settings/AdminCenter/Index'))
 );
 
-export const NotFound = Loadable(lazy(() => import('./pages/NotFound')));
+export const NotFound = Loadable(
+  lazy(() => import('./components/errors/NotFound'))
+);
 export const Login = Loadable(lazy(() => import('./pages/Auth/Login')));
 export const Logout = Loadable(lazy(() => import('./pages/Auth/Logout')));
 export const Logged_In = Loadable(lazy(() => import('./pages/Auth/Logged-In')));
diff --git a/src/frontend/tests/baseFixtures.ts b/src/frontend/tests/baseFixtures.ts
index 841a91acaf..5789f7e975 100644
--- a/src/frontend/tests/baseFixtures.ts
+++ b/src/frontend/tests/baseFixtures.ts
@@ -64,7 +64,8 @@ export const test = baseTest.extend({
         url != 'http://localhost:8000/api/barcode/' &&
         url != 'http://localhost:8000/api/news/?search=&offset=0&limit=25' &&
         url != 'https://docs.inventree.org/en/versions.json' &&
-        !url.startsWith('chrome://')
+        !url.startsWith('chrome://') &&
+        url.indexOf('99999') < 0
       )
         messages.push(msg);
     });
diff --git a/src/frontend/tests/login.ts b/src/frontend/tests/login.ts
index 0be2945163..d4cef1d681 100644
--- a/src/frontend/tests/login.ts
+++ b/src/frontend/tests/login.ts
@@ -31,10 +31,14 @@ export const doQuickLogin = async (
   password = password ?? user.password;
   url = url ?? baseUrl;
 
-  // await page.goto(logoutUrl);
   await page.goto(`${url}/login/?login=${username}&password=${password}`);
   await page.waitForURL('**/platform/home');
   await page
     .getByRole('heading', { name: 'Welcome to your Dashboard,' })
     .waitFor();
 };
+
+export const doLogout = async (page) => {
+  await page.goto(`${baseUrl}/logout/`);
+  await page.waitForURL('**/platform/login');
+};
diff --git a/src/frontend/tests/pages/pui_part.spec.ts b/src/frontend/tests/pages/pui_part.spec.ts
index d411738184..bcf8d86ff1 100644
--- a/src/frontend/tests/pages/pui_part.spec.ts
+++ b/src/frontend/tests/pages/pui_part.spec.ts
@@ -224,3 +224,13 @@ test('PUI - Pages - Part - Notes', async ({ page }) => {
   // Check that the original notes are still present
   await page.getByText('This is some data').waitFor();
 });
+
+test('PUI - Pages - Part - 404', async ({ page }) => {
+  await doQuickLogin(page);
+
+  await page.goto(`${baseUrl}/part/99999/`);
+  await page.getByText('Page Not Found', { exact: true }).waitFor();
+
+  // Clear out any console error messages
+  await page.evaluate(() => console.clear());
+});
diff --git a/src/frontend/tests/pui_basic.spec.ts b/src/frontend/tests/pui_basic.spec.ts
index e7d8c3d74c..fa23b82279 100644
--- a/src/frontend/tests/pui_basic.spec.ts
+++ b/src/frontend/tests/pui_basic.spec.ts
@@ -54,4 +54,5 @@ test('PUI - Quick Login Test', async ({ page }) => {
   // Logout (via URL)
   await page.goto(`${baseUrl}/logout/`);
   await page.waitForURL('**/platform/login');
+  await page.getByLabel('username');
 });
diff --git a/src/frontend/tests/pui_general.spec.ts b/src/frontend/tests/pui_general.spec.ts
index c436308c5e..a62547aca3 100644
--- a/src/frontend/tests/pui_general.spec.ts
+++ b/src/frontend/tests/pui_general.spec.ts
@@ -1,6 +1,6 @@
 import { test } from './baseFixtures.js';
 import { baseUrl } from './defaults.js';
-import { doQuickLogin } from './login.js';
+import { doLogout, doQuickLogin } from './login.js';
 
 test('PUI - Parts', async ({ page }) => {
   await doQuickLogin(page);
@@ -141,57 +141,6 @@ test('PUI - Scanning', async ({ page }) => {
   await page.getByRole('option', { name: 'Manual input' }).click();
 });
 
-test('PUI - Admin', async ({ page }) => {
-  // Note here we login with admin access
-  await doQuickLogin(page, 'admin', 'inventree');
-
-  // User settings
-  await page.getByRole('button', { name: 'admin' }).click();
-  await page.getByRole('menuitem', { name: 'Account settings' }).click();
-  await page.getByRole('tab', { name: 'Security' }).click();
-  //await page.getByRole('tab', { name: 'Dashboard' }).click();
-  await page.getByRole('tab', { name: 'Display Options' }).click();
-  await page.getByText('Date Format').waitFor();
-  await page.getByRole('tab', { name: 'Search' }).click();
-  await page.getByText('Regex Search').waitFor();
-  await page.getByRole('tab', { name: 'Notifications' }).click();
-  await page.getByRole('tab', { name: 'Reporting' }).click();
-  await page.getByText('Inline report display').waitFor();
-
-  // System Settings
-  await page.getByRole('link', { name: 'Switch to System Setting' }).click();
-  await page.getByText('Base URL', { exact: true }).waitFor();
-  await page.getByRole('tab', { name: 'Login' }).click();
-  await page.getByRole('tab', { name: 'Barcodes' }).click();
-  await page.getByRole('tab', { name: 'Notifications' }).click();
-  await page.getByRole('tab', { name: 'Pricing' }).click();
-  await page.getByRole('tab', { name: 'Labels' }).click();
-  await page.getByRole('tab', { name: 'Reporting' }).click();
-  await page.getByRole('tab', { name: 'Part Categories' }).click();
-  //wait page.locator('#mantine-9hqbwrml8-tab-parts').click();
-  //await page.locator('#mantine-9hqbwrml8-tab-stock').click();
-  await page.getByRole('tab', { name: 'Stocktake' }).click();
-  await page.getByRole('tab', { name: 'Build Orders' }).click();
-  await page.getByRole('tab', { name: 'Purchase Orders' }).click();
-  await page.getByRole('tab', { name: 'Sales Orders' }).click();
-  await page.getByRole('tab', { name: 'Return Orders' }).click();
-
-  // Admin Center
-  await page.getByRole('button', { name: 'admin' }).click();
-  await page.getByRole('menuitem', { name: 'Admin Center' }).click();
-  await page.getByRole('tab', { name: 'Background Tasks' }).click();
-  await page.getByRole('tab', { name: 'Error Reports' }).click();
-  await page.getByRole('tab', { name: 'Currencies' }).click();
-  await page.getByRole('tab', { name: 'Project Codes' }).click();
-  await page.getByRole('tab', { name: 'Custom Units' }).click();
-  await page.getByRole('tab', { name: 'Part Parameters' }).click();
-  await page.getByRole('tab', { name: 'Category Parameters' }).click();
-  await page.getByRole('tab', { name: 'Label Templates' }).click();
-  await page.getByRole('tab', { name: 'Report Templates' }).click();
-  await page.getByRole('tab', { name: 'Plugins' }).click();
-  await page.getByRole('tab', { name: 'Machines' }).click();
-});
-
 test('PUI - Language / Color', async ({ page }) => {
   await doQuickLogin(page);
 
diff --git a/src/frontend/tests/pui_settings.spec.ts b/src/frontend/tests/pui_settings.spec.ts
new file mode 100644
index 0000000000..b0962dcd36
--- /dev/null
+++ b/src/frontend/tests/pui_settings.spec.ts
@@ -0,0 +1,83 @@
+import { test } from './baseFixtures.js';
+import { baseUrl } from './defaults.js';
+import { doLogout, doQuickLogin } from './login.js';
+
+test('PUI - Admin', async ({ page }) => {
+  // Note here we login with admin access
+  await doQuickLogin(page, 'admin', 'inventree');
+
+  // User settings
+  await page.getByRole('button', { name: 'admin' }).click();
+  await page.getByRole('menuitem', { name: 'Account settings' }).click();
+  await page.getByRole('tab', { name: 'Security' }).click();
+
+  await page.getByRole('tab', { name: 'Display Options' }).click();
+  await page.getByText('Date Format').waitFor();
+  await page.getByRole('tab', { name: 'Search' }).click();
+  await page.getByText('Regex Search').waitFor();
+  await page.getByRole('tab', { name: 'Notifications' }).click();
+  await page.getByRole('tab', { name: 'Reporting' }).click();
+  await page.getByText('Inline report display').waitFor();
+
+  // System Settings
+  await page.getByRole('link', { name: 'Switch to System Setting' }).click();
+  await page.getByText('Base URL', { exact: true }).waitFor();
+  await page.getByRole('tab', { name: 'Login' }).click();
+  await page.getByRole('tab', { name: 'Barcodes' }).click();
+  await page.getByRole('tab', { name: 'Notifications' }).click();
+  await page.getByRole('tab', { name: 'Pricing' }).click();
+  await page.getByRole('tab', { name: 'Labels' }).click();
+  await page.getByRole('tab', { name: 'Reporting' }).click();
+  await page.getByRole('tab', { name: 'Part Categories' }).click();
+
+  await page.getByRole('tab', { name: 'Stocktake' }).click();
+  await page.getByRole('tab', { name: 'Build Orders' }).click();
+  await page.getByRole('tab', { name: 'Purchase Orders' }).click();
+  await page.getByRole('tab', { name: 'Sales Orders' }).click();
+  await page.getByRole('tab', { name: 'Return Orders' }).click();
+
+  // Admin Center
+  await page.getByRole('button', { name: 'admin' }).click();
+  await page.getByRole('menuitem', { name: 'Admin Center' }).click();
+  await page.getByRole('tab', { name: 'Background Tasks' }).click();
+  await page.getByRole('tab', { name: 'Error Reports' }).click();
+  await page.getByRole('tab', { name: 'Currencies' }).click();
+  await page.getByRole('tab', { name: 'Project Codes' }).click();
+  await page.getByRole('tab', { name: 'Custom Units' }).click();
+  await page.getByRole('tab', { name: 'Part Parameters' }).click();
+  await page.getByRole('tab', { name: 'Category Parameters' }).click();
+  await page.getByRole('tab', { name: 'Label Templates' }).click();
+  await page.getByRole('tab', { name: 'Report Templates' }).click();
+  await page.getByRole('tab', { name: 'Plugins' }).click();
+  await page.getByRole('tab', { name: 'Machines' }).click();
+});
+
+test('PUI - Admin - Unauthorized', async ({ page }) => {
+  // Try to access "admin" page with a non-staff user
+  await doQuickLogin(page, 'allaccess', 'nolimits');
+
+  await page.goto(`${baseUrl}/settings/admin/`);
+  await page.waitForURL('**/settings/admin/**');
+
+  // Should get a permission denied message
+  await page.getByText('Permission Denied').waitFor();
+  await page
+    .getByRole('button', { name: 'Return to the index page' })
+    .waitFor();
+
+  // Try to access user settings page (should be accessible)
+  await page.goto(`${baseUrl}/settings/user/`);
+  await page.waitForURL('**/settings/user/**');
+
+  await page.getByRole('tab', { name: 'Display Options' }).click();
+  await page.getByRole('tab', { name: 'Account' }).click();
+
+  // Try to access global settings page
+  await page.goto(`${baseUrl}/settings/system/`);
+  await page.waitForURL('**/settings/system/**');
+
+  await page.getByText('Permission Denied').waitFor();
+  await page
+    .getByRole('button', { name: 'Return to the index page' })
+    .waitFor();
+});