Fatal error: Uncaught Error: Class "App\Http\Controllers\Controller" not found in C:\xampp\htdocs\hannoole\POS\app\Http\Controllers\Purchase\PurchaseOrderController.php:31 Stack trace: #0 {main} thrown in C:\xampp\htdocs\hannoole\POS\app\Http\Controllers\Purchase\PurchaseOrderController.php on line 31