Fatal error: Uncaught Error: Class "Doctrine\Persistence\Event\ManagerEventArgs" not found in /var/www/html/vendor/doctrine/orm/src/Event/OnClassMetadataNotFoundEventArgs.php:20 Stack trace: #0 {main} thrown in /var/www/html/vendor/doctrine/orm/src/Event/OnClassMetadataNotFoundEventArgs.php on line 20