Fatal error: Uncaught Error: Class 'Symfony\Component\Mime\Part\DataPart' not found in /data/htmlwww/laravel-system/vendor/symfony/mime/Part/MessagePart.php:22 Stack trace: #0 {main} thrown in /data/htmlwww/laravel-system/vendor/symfony/mime/Part/MessagePart.php on line 22