Fatal error: Uncaught Error: Class 'Doctrine\ORM\Exception\ORMException' not found in /home/benjamincb/demos/acdg/vendor/doctrine/orm/lib/Doctrine/ORM/PessimisticLockException.php:9 Stack trace: #0 {main} thrown in /home/benjamincb/demos/acdg/vendor/doctrine/orm/lib/Doctrine/ORM/PessimisticLockException.php on line 9