Fatal error: Uncaught Error: Interface "Symfony\Component\Messenger\Transport\Serialization\SerializerInterface" not found in /var/www/html/v12.hallescherfc.de/vendor/symfony/messenger/Transport/Serialization/SigningSerializer.php:20 Stack trace: #0 {main} thrown in /var/www/html/v12.hallescherfc.de/vendor/symfony/messenger/Transport/Serialization/SigningSerializer.php on line 20