Fatal error: Uncaught Error: Class "App\Http\Controllers\Controller" not found in C:\xampp\htdocs\thongke-sanluong\app\Http\Controllers\TinhSanLuongController.php:8 Stack trace: #0 {main} thrown in C:\xampp\htdocs\thongke-sanluong\app\Http\Controllers\TinhSanLuongController.php on line 8