Fatal error: Uncaught Error: Class "Osp\Base\OspStub" not found in C:\xampp\htdocs\updatejd\src\vipapis\normal\SalesProductService.php:23 Stack trace: #0 C:\xampp\htdocs\updatejd\src\vipapis\normal\SalesProductServiceHelper.php(12): require_once() #1 {main} thrown in C:\xampp\htdocs\updatejd\src\vipapis\normal\SalesProductService.php on line 23