Fatal error: Uncaught Error: Class "Symfony\Contracts\EventDispatcher\Event" not found in /var/www/html/sitefelicien/azuracast/backend/src/Event/Media/WriteMetadata.php:10 Stack trace: #0 {main} thrown in /var/www/html/sitefelicien/azuracast/backend/src/Event/Media/WriteMetadata.php on line 10