Fatal error: Uncaught Error: Class "Doctrine\Persistence\Event\OnClearEventArgs" not found in /home/ldt/public_html/canvas/udoit/vendor/doctrine/orm/src/Event/OnClearEventArgs.php:18 Stack trace: #0 {main} thrown in /home/ldt/public_html/canvas/udoit/vendor/doctrine/orm/src/Event/OnClearEventArgs.php on line 18