Fatal error: Uncaught Error: Class "Doctrine\ORM\Persisters\Collection\AbstractCollectionPersister" not found in /home/daysdej/oli-in/vendor/doctrine/orm/lib/Doctrine/ORM/Persisters/Collection/ManyToManyPersister.php:31 Stack trace: #0 {main} thrown in /home/daysdej/oli-in/vendor/doctrine/orm/lib/Doctrine/ORM/Persisters/Collection/ManyToManyPersister.php on line 31