Fatal error: Uncaught Error: Class "Symfony\Component\Mailer\Transport\AbstractTransport" not found in /home/rcmch/test.m-s-i.ch/vendor/typo3/cms-core/Classes/Mail/FileSpool.php:38 Stack trace: #0 {main} thrown in /home/rcmch/test.m-s-i.ch/vendor/typo3/cms-core/Classes/Mail/FileSpool.php on line 38