Fatal error: Uncaught Error: Class "Symfony\Component\EventDispatcher\EventDispatcher" not found in /var/www/html/sitefelicien/azuracast/backend/src/CallableEventDispatcher.php:14 Stack trace: #0 {main} thrown in /var/www/html/sitefelicien/azuracast/backend/src/CallableEventDispatcher.php on line 14