diff --git a/src/addons/mod/assign/services/assign.ts b/src/addons/mod/assign/services/assign.ts
index a6e573451..8ebc66911 100644
--- a/src/addons/mod/assign/services/assign.ts
+++ b/src/addons/mod/assign/services/assign.ts
@@ -1377,6 +1377,8 @@ export class AddonModAssignProvider {
                 // The WebService returned warnings, reject.
                 throw new CoreWSError(warnings[0]);
             }
+
+            return;
         }
 
         // WS not available, fallback to save_grade.