Fatal error: Uncaught Error: Class "Symfony\Component\Mime\Part\TextPart" not found in /opt/lampp/htdocs/forum/flarum/vendor/symfony/mime/Part/DataPart.php:21 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/forum/flarum/vendor/symfony/mime/Part/DataPart.php on line 21