add return

apps/app/src/pages/admin/user-group-detail/[userGroupId].page.tsx

@@ -36,7 +36,7 @@ const AdminUserGroupDetailPage: NextPage<Props> = (props: Props) => {
   useIsAclEnabled(props.isAclEnabled);
 
   if (props.isAccessDeniedForNonAdminUser) {
-    <ForbiddenPage />;
+    return <ForbiddenPage />;
   }
 
   return (

apps/app/src/pages/admin/users/external-accounts.page.tsx

@@ -34,7 +34,7 @@ const AdminUserManagementPage: NextPage<CommonProps> = (props) => {
   }
 
   if (props.isAccessDeniedForNonAdminUser) {
-    <ForbiddenPage />;
+    return <ForbiddenPage />;
   }
 
   return (

apps/app/src/pages/admin/users/index.page.tsx

@@ -40,7 +40,7 @@ const AdminUserManagementPage: NextPage<Props> = (props) => {
   }
 
   if (props.isAccessDeniedForNonAdminUser) {
-    <ForbiddenPage />;
+    return <ForbiddenPage />;
   }
 
   return (

apps/app/src/utils/admin-page-util.ts

@@ -45,7 +45,7 @@ export const retrieveServerSideProps: any = async(
   }
 
   props.isAccessDeniedForNonAdminUser = props.currentUser == null
-    ? false
+    ? true
     : !props.currentUser.admin;
 
   await injectNextI18NextConfigurations(context, props, ['admin', 'commons']);