Fatal error: Uncaught Error: Class "Doctrine\ORM\Exception\PersisterException" not found in /home/astechc1/public_html/vendor/doctrine/orm/lib/Doctrine/ORM/Persisters/MatchingAssociationFieldRequiresObject.php:11 Stack trace: #0 {main} thrown in /home/astechc1/public_html/vendor/doctrine/orm/lib/Doctrine/ORM/Persisters/MatchingAssociationFieldRequiresObject.php on line 11