Fatal error: Uncaught Error: Class "Doctrine\Common\EventArgs" not found in /var/www/apache/dev/cal/web/vendor/doctrine/persistence/lib/Doctrine/Persistence/Event/OnClearEventArgs.php:12 Stack trace: #0 {main} thrown in /var/www/apache/dev/cal/web/vendor/doctrine/persistence/lib/Doctrine/Persistence/Event/OnClearEventArgs.php on line 12