Fatal error: Uncaught Error: Class "Doctrine\Common\DataFixtures\AbstractFixture" not found in /home/iotechtniu/ioacademy/vendor/doctrine/doctrine-fixtures-bundle/Fixture.php:13 Stack trace: #0 {main} thrown in /home/iotechtniu/ioacademy/vendor/doctrine/doctrine-fixtures-bundle/Fixture.php on line 13