Fatal error: Uncaught Error: Class "Symfony\Component\Mailer\Transport\AbstractTransportFactory" not found in /home/bimmertest/BookStack/vendor/ssddanbrown/symfony-mailer/Transport/Smtp/EsmtpTransportFactory.php:22 Stack trace: #0 {main} thrown in /home/bimmertest/BookStack/vendor/ssddanbrown/symfony-mailer/Transport/Smtp/EsmtpTransportFactory.php on line 22