Fatal error: Uncaught Error: Class "Doctrine\Common\EventManager" not found in /home/ldt/public_html/canvas/udoit/vendor/symfony/doctrine-bridge/ContainerAwareEventManager.php:24 Stack trace: #0 {main} thrown in /home/ldt/public_html/canvas/udoit/vendor/symfony/doctrine-bridge/ContainerAwareEventManager.php on line 24