diff --git a/apps/red-ui/src/app/components/admin-page-header/admin-breadcrumbs.component.html b/apps/red-ui/src/app/components/admin-page-header/admin-breadcrumbs.component.html
index 8d121eaf0..ddc442bab 100644
--- a/apps/red-ui/src/app/components/admin-page-header/admin-breadcrumbs.component.html
+++ b/apps/red-ui/src/app/components/admin-page-header/admin-breadcrumbs.component.html
@@ -14,16 +14,7 @@
         [routerLinkActiveOptions]="{ exact: true }"
         routerLinkActive="active"
         translate="digital-signature"
-        *ngIf="root"
-    ></a>
-
-    <a
-        class="breadcrumb"
-        [routerLink]="'/ui/admin/users'"
-        [routerLinkActiveOptions]="{ exact: true }"
-        routerLinkActive="active"
-        translate="user-management"
-        *ngIf="root && userPreferenceService.areDevFeaturesEnabled"
+        *ngIf="root && permissionService.isAdmin()"
     ></a>
 
     <a
@@ -32,6 +23,15 @@
         [routerLinkActiveOptions]="{ exact: true }"
         routerLinkActive="active"
         translate="license-information"
+        *ngIf="root && permissionService.isAdmin()"
+    ></a>
+
+    <a
+        class="breadcrumb"
+        [routerLink]="'/ui/admin/users'"
+        [routerLinkActiveOptions]="{ exact: true }"
+        routerLinkActive="active"
+        translate="user-management"
         *ngIf="root && userPreferenceService.areDevFeaturesEnabled"
     ></a>
 
diff --git a/apps/red-ui/src/app/screens/admin/digital-signature-screen/digital-signature-screen.component.ts b/apps/red-ui/src/app/screens/admin/digital-signature-screen/digital-signature-screen.component.ts
index f0a32c9d8..7381bc6a6 100644
--- a/apps/red-ui/src/app/screens/admin/digital-signature-screen/digital-signature-screen.component.ts
+++ b/apps/red-ui/src/app/screens/admin/digital-signature-screen/digital-signature-screen.component.ts
@@ -44,12 +44,20 @@ export class DigitalSignatureScreenComponent {
                     NotificationType.SUCCESS
                 );
             },
-            () => {
-                this._notificationService.showToastNotification(
-                    this._translateService.instant('digital-signature-screen.action.save-error'),
-                    null,
-                    NotificationType.ERROR
-                );
+            (error) => {
+                if (error.status === 400) {
+                    this._notificationService.showToastNotification(
+                        this._translateService.instant('digital-signature-screen.action.certificate-not-valid-error'),
+                        null,
+                        NotificationType.ERROR
+                    );
+                } else {
+                    this._notificationService.showToastNotification(
+                        this._translateService.instant('digital-signature-screen.action.save-error'),
+                        null,
+                        NotificationType.ERROR
+                    );
+                }
             }
         );
     }
diff --git a/apps/red-ui/src/assets/i18n/de.json b/apps/red-ui/src/assets/i18n/de.json
index 6b1c086d0..1ca333104 100644
--- a/apps/red-ui/src/assets/i18n/de.json
+++ b/apps/red-ui/src/assets/i18n/de.json
@@ -821,6 +821,7 @@
             "reset": "Zurücksetzen",
             "save-success": "Digitale Signatur erfolgreich gespeichert",
             "save-error": "Fehler beim Speichern der digitalen Signatur",
+            "certificate-not-valid-error": "Das hochgeladene Zertifikat gilt nicht zum Signieren von PDFs. Das PCKS.12-Format ist erforderlich.",
             "delete-success": "Digitale Signatur entfernt. Redigierte Dateien werden nicht mehr signiert!",
             "delete-error": "Fehler beim Entfernen der digitalen Signatur. Versuchen Sie es erneut."
         }
diff --git a/apps/red-ui/src/assets/i18n/en.json b/apps/red-ui/src/assets/i18n/en.json
index 111f2e09c..80e2ae2b3 100644
--- a/apps/red-ui/src/assets/i18n/en.json
+++ b/apps/red-ui/src/assets/i18n/en.json
@@ -821,6 +821,7 @@
             "reset": "Reset",
             "save-success": "Digital signature saved successfully",
             "save-error": "Failed to save digital signature",
+            "certificate-not-valid-error": "Uploaded Certificate is not valid for signing PDFs. PCKS.12 format is required.",
             "delete-success": "Digital signature removed. Redacted files will no longer be signed!",
             "delete-error": "Failed to remove digital signature, please try again."
         }
diff --git a/tools/auto-i18n/translateCache-de.txt b/tools/auto-i18n/translateCache-de.txt
index cdd615adf..e904d8df7 100644
--- a/tools/auto-i18n/translateCache-de.txt
+++ b/tools/auto-i18n/translateCache-de.txt
@@ -592,3 +592,6 @@ The use of this product is subject to the terms of the Redaction End User Agreem
 Digital signature removed. Redacted files will no longer be signed!|Digitale Signatur entfernt. Redigierte Dateien werden nicht mehr signiert!
 No members yet.
 Select from the list below.|Noch keine Mitglieder. Wählen Sie aus der folgenden Liste.
+No members yet.
+Select from the list below.|Noch keine Mitglieder. Wählen Sie aus der folgenden Liste.
+Uploaded Certificate is not valid for signing PDFs. PCKS.12 format is required.|Das hochgeladene Zertifikat gilt nicht zum Signieren von PDFs. Das PCKS.12-Format ist erforderlich.