/errors/url_field_error.proto 

--- v18/errors/url_field_error.proto    2025-08-05 14:36:11.000000000 +0000
+++ v19/errors/url_field_error.proto    2025-08-05 14:36:15.000000000 +0000
@@ -210,5 +210,8 @@

     // Track parameter is not supported.
     VALUE_TRACK_PARAMETER_NOT_SUPPORTED = 58;
+
+    // The app store connected to the url is not supported.
+    UNSUPPORTED_APP_STORE = 59;
   }
 }