Fatal error: Uncaught Error: Class 'Sonata\CoreBundle\Model\BaseManager' not found in /home/lafaamicps/www/symfony/vendor/sonata-project/core-bundle/Model/BaseEntityManager.php:21 Stack trace: #0 {main} thrown in /home/lafaamicps/www/symfony/vendor/sonata-project/core-bundle/Model/BaseEntityManager.php on line 21