Fatal error: Uncaught Error: Class "Doctrine\Common\EventArgs" not found in /home/projetwewv/www/licence00/symfony/vendor/doctrine/orm/lib/Doctrine/ORM/Event/PreFlushEventArgs.php:34 Stack trace: #0 {main} thrown in /home/projetwewv/www/licence00/symfony/vendor/doctrine/orm/lib/Doctrine/ORM/Event/PreFlushEventArgs.php on line 34