Fatal error: Uncaught Error: Class 'App\Http\Controllers\Controller' not found in /mnt/volume_lon1_01/backend/adminseppi/app/Http/Controllers/MailController.php:14 Stack trace: #0 {main} thrown in /mnt/volume_lon1_01/backend/adminseppi/app/Http/Controllers/MailController.php on line 14