Fatal error: Uncaught Error: Class "Osp\Base\OspStub" not found in C:\xampp\htdocs\tmall\src\vipapis\message\MessageService.php:21 Stack trace: #0 C:\xampp\htdocs\tmall\src\vipapis\message\MessageServiceHelper.php(12): require_once() #1 {main} thrown in C:\xampp\htdocs\tmall\src\vipapis\message\MessageService.php on line 21