Fatal error: Uncaught Error: Class 'Doctrine\ORM\Persisters\AbstractCollectionPersister' not found in /home/almasai/www/people/_old_site/vendor/doctrine/lib/Doctrine/ORM/Persisters/ElementCollectionPersister.php:30 Stack trace: #0 {main} thrown in /home/almasai/www/people/_old_site/vendor/doctrine/lib/Doctrine/ORM/Persisters/ElementCollectionPersister.php on line 30