Fatal error: Uncaught Error: Class "App\Http\Controllers\Controller" not found in C:\xampp\htdocs\ducev\app\Http\Controllers\admin\Dropbox\DropboxAuthController.php:13 Stack trace: #0 {main} thrown in C:\xampp\htdocs\ducev\app\Http\Controllers\admin\Dropbox\DropboxAuthController.php on line 13