Fatal error: Uncaught Error: Class "Osp\Base\OspStub" not found in C:\xampp\htdocs\tmall\src\vipapis\product\ProductSchemaService.php:25 Stack trace: #0 C:\xampp\htdocs\tmall\src\vipapis\product\ProductSchemaServiceHelper.php(12): require_once() #1 {main} thrown in C:\xampp\htdocs\tmall\src\vipapis\product\ProductSchemaService.php on line 25