Fatal error: Uncaught Error: Interface "Doctrine\Common\Collections\Collection" not found in /home/u6668910/public_html/lab/vendor/doctrine/orm/lib/Doctrine/ORM/PersistentCollection.php:47 Stack trace: #0 {main} thrown in /home/u6668910/public_html/lab/vendor/doctrine/orm/lib/Doctrine/ORM/PersistentCollection.php on line 47