Fatal error: Uncaught Error: Class 'Doctrine\Common\EventArgs' not found in /home/thomaeo/www/vendor/doctrine/orm/lib/Doctrine/ORM/Event/PreFlushEventArgs.php:16 Stack trace: #0 {main} thrown in /home/thomaeo/www/vendor/doctrine/orm/lib/Doctrine/ORM/Event/PreFlushEventArgs.php on line 16