diff --git a/app/routes/main.py b/app/routes/main.py
index 25503f4..00c90a7 100644
--- a/app/routes/main.py
+++ b/app/routes/main.py
@@ -27,7 +27,14 @@ def index():
 
 @main_bp.route('/configs/<path:filename>')
 def serve_config_file(filename):
-    return send_from_directory(current_app.config['CONFIG_DIR'], filename)
+    """
+    Serviert Bilder aus dem configs-Ordner (für Lok-Bilder in Kacheln)
+    """
+    try:
+        return send_from_directory(current_app.config['CONFIG_DIR'], filename)
+    except Exception as e:
+        current_app.logger.error(f"Fehler beim Servieren von {filename}: {e}")
+        return "Datei nicht gefunden", 404
 
 
 @main_bp.route('/load_config/<filename>')