Fatal error: Uncaught Error: Class "App\Message\AbstractUniqueMessage" not found in /var/www/html/sitefelicien/azuracast/backend/src/Message/ProcessCoverArtMessage.php:9 Stack trace: #0 {main} thrown in /var/www/html/sitefelicien/azuracast/backend/src/Message/ProcessCoverArtMessage.php on line 9