Fatal error: Uncaught Error: Class "Model" not found in C:\xampp\htdocs\yxs.sciensources.com\Backend\Wechat\NewsMaterial\NewsMaterialModel.php:6 Stack trace: #0 {main} thrown in C:\xampp\htdocs\yxs.sciensources.com\Backend\Wechat\NewsMaterial\NewsMaterialModel.php on line 6