Fatal error: Uncaught Error: Class "Model" not found in C:\xampp\htdocs\yxs.sciensources.com\gt\Backend\Seller\FixSelling\FixSellingModel.php:4 Stack trace: #0 {main} thrown in C:\xampp\htdocs\yxs.sciensources.com\gt\Backend\Seller\FixSelling\FixSellingModel.php on line 4