Fatal error: Uncaught Error: Class 'Illuminate\Http\UploadedFile' not found in /mnt/volume_lon1_01/backend/admin/vendor/laravel/framework/src/Illuminate/Http/Testing/File.php:7 Stack trace: #0 {main} thrown in /mnt/volume_lon1_01/backend/admin/vendor/laravel/framework/src/Illuminate/Http/Testing/File.php on line 7