Fatal error: Uncaught Error: Interface 'Doctrine\Common\Collections\Collection' not found in /home/almasai/www/people/_old_site/vendor/doctrine/lib/Doctrine/ORM/PersistentCollection.php:42 Stack trace: #0 {main} thrown in /home/almasai/www/people/_old_site/vendor/doctrine/lib/Doctrine/ORM/PersistentCollection.php on line 42