diff --git a/plugins/app-backend/src/service/router.ts b/plugins/app-backend/src/service/router.ts
index 9e1c61b9fc..a49a2918c7 100644
--- a/plugins/app-backend/src/service/router.ts
+++ b/plugins/app-backend/src/service/router.ts
@@ -220,7 +220,9 @@ export async function createRouter(
           req.method = 'GET';
           next('router');
         } else {
-          throw new InputError('Invalid POST request to /');
+          throw new InputError(
+            'Invalid POST request to app-backend wildcard endpoint',
+          );
         }
       },
     );