Fatal error: Uncaught Error: Interface 'Symfony\Component\Notifier\Message\MessageInterface' not found in /home/benjamincb/demos/acdg/vendor/symfony/notifier/Message/ChatMessage.php:19 Stack trace: #0 {main} thrown in /home/benjamincb/demos/acdg/vendor/symfony/notifier/Message/ChatMessage.php on line 19