Fatal error: Uncaught Error: Class "App\Http\Controllers\Controller" not found in D:\programs\xampp\htdocs\backend-test\app\Http\Controllers\Api\DataTable\ClientDataTableController.php:12 Stack trace: #0 {main} thrown in D:\programs\xampp\htdocs\backend-test\app\Http\Controllers\Api\DataTable\ClientDataTableController.php on line 12