Fatal error: Uncaught Error: Class "Doctrine\ORM\Persisters\Collection\AbstractCollectionPersister" not found in D:\xampp\htdocs\pimcore\my-project\vendor\doctrine\orm\src\Persisters\Collection\OneToManyPersister.php:30 Stack trace: #0 {main} thrown in D:\xampp\htdocs\pimcore\my-project\vendor\doctrine\orm\src\Persisters\Collection\OneToManyPersister.php on line 30