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/MemorySpool.php:40 Stack trace: #0 {main} thrown in /var/www/html/dev.hallescherfc.de/vendor/typo3/cms-core/Classes/Mail/MemorySpool.php on line 40