Fatal error: Uncaught Error: Class 'Doctrine\ORM\Exception\PersisterException' not found in /home/thomaeo/www/vendor/doctrine/orm/lib/Doctrine/ORM/Persisters/MatchingAssociationFieldRequiresObject.php:13 Stack trace: #0 {main} thrown in /home/thomaeo/www/vendor/doctrine/orm/lib/Doctrine/ORM/Persisters/MatchingAssociationFieldRequiresObject.php on line 13