Fatal error: Uncaught Error: Class "Symfony\Component\Mailer\Transport\AbstractTransport" not found in /var/www/html/dev.hallescherfc.de/vendor/typo3/cms-core/Classes/Mail/FileSpool.php:38 Stack trace: #0 {main} thrown in /var/www/html/dev.hallescherfc.de/vendor/typo3/cms-core/Classes/Mail/FileSpool.php on line 38