Fatal error: Uncaught Error: Class 'Doctrine\ORM\Id\AbstractIdGenerator' not found in /home/cgenial/sandbox.cgenial.org/vendor/doctrine/orm/lib/Doctrine/ORM/Id/IdentityGenerator.php:29 Stack trace: #0 {main} thrown in /home/cgenial/sandbox.cgenial.org/vendor/doctrine/orm/lib/Doctrine/ORM/Id/IdentityGenerator.php on line 29