Fatal error: Uncaught Error: Class 'Doctrine\ORM\Persisters\AbstractCollectionPersister' not found in /home/synap/fr/synap/dev/www/7/vendor/doctrine/orm/lib/Doctrine/ORM/Persisters/ManyToManyPersister.php:34 Stack trace: #0 {main} thrown in /home/synap/fr/synap/dev/www/7/vendor/doctrine/orm/lib/Doctrine/ORM/Persisters/ManyToManyPersister.php on line 34