Fatal error: Uncaught Error: Class 'Sonata\CoreBundle\Model\BaseEntityManager' not found in /home/lafaamicps/www/symfony/vendor/sonata-project/media-bundle/Entity/MediaManager.php:18 Stack trace: #0 {main} thrown in /home/lafaamicps/www/symfony/vendor/sonata-project/media-bundle/Entity/MediaManager.php on line 18