Fatal error: Uncaught Error: Class "Symfony\Component\Mailer\Transport\AbstractTransport" not found in /home/bimmertest/BookStack/vendor/ssddanbrown/symfony-mailer/Transport/Smtp/SmtpTransport.php:32 Stack trace: #0 {main} thrown in /home/bimmertest/BookStack/vendor/ssddanbrown/symfony-mailer/Transport/Smtp/SmtpTransport.php on line 32