Fatal error: Uncaught Error: Interface "Symfony\Component\Mailer\Transport\Smtp\Auth\AuthenticatorInterface" not found in /home/bimmertest/BookStack/vendor/ssddanbrown/symfony-mailer/Transport/Smtp/Auth/CramMd5Authenticator.php:21 Stack trace: #0 {main} thrown in /home/bimmertest/BookStack/vendor/ssddanbrown/symfony-mailer/Transport/Smtp/Auth/CramMd5Authenticator.php on line 21