Fatal error: Uncaught Error: Class 'Doctrine\Common\EventManager' not found in /home/users/00/3c/21/home/www/vendor/symfony/doctrine-bridge/ContainerAwareEventManager.php:23 Stack trace: #0 {main} thrown in /home/users/00/3c/21/home/www/vendor/symfony/doctrine-bridge/ContainerAwareEventManager.php on line 23