Fatal error: Uncaught Error: Class "Doctrine\ORM\Persisters\Collection\AbstractCollectionPersister" not found in I:\www\picman\vendor\doctrine\orm\src\Persisters\Collection\OneToManyPersister.php:30 Stack trace: #0 {main} thrown in I:\www\picman\vendor\doctrine\orm\src\Persisters\Collection\OneToManyPersister.php on line 30