diff --git a/backend/routes/admin.py b/backend/routes/admin.py
index be0c8ed..a8fa045 100644
--- a/backend/routes/admin.py
+++ b/backend/routes/admin.py
@@ -799,7 +799,10 @@ async def get_analytics(user=Depends(require_mod)):
     site_id = os.getenv("UMAMI_SITE_ID", "")
     if not url or not site_id:
         raise HTTPException(503, "Umami nicht konfiguriert.")
-    token   = await _umami_auth()
+    try:
+        token = await _umami_auth()
+    except Exception as e:
+        raise HTTPException(503, f"Umami-Login fehlgeschlagen: Bitte UMAMI_USERNAME und UMAMI_PASSWORD in .env prüfen. ({e})")
     headers = {"Authorization": f"Bearer {token}"}
 
     now         = datetime.now(_TZ)