Fatal error: Uncaught Error: Class "Doctrine\ORM\Id\AbstractIdGenerator" not found in /home/zdpktgd/ptc/vendor/doctrine/doctrine-bundle/tests/DependencyInjection/Fixtures/CustomIdGenerator.php:8 Stack trace: #0 {main} thrown in /home/zdpktgd/ptc/vendor/doctrine/doctrine-bundle/tests/DependencyInjection/Fixtures/CustomIdGenerator.php on line 8