Fatal error: Uncaught Error: Class "Doctrine\ORM\Persisters\PersisterException" not found in /home/ldt/public_html/canvas/udoit/vendor/doctrine/orm/src/Exception/PersisterException.php:9 Stack trace: #0 {main} thrown in /home/ldt/public_html/canvas/udoit/vendor/doctrine/orm/src/Exception/PersisterException.php on line 9