Fatal error: Uncaught Error: Interface 'FOS\UserBundle\Model\GroupManagerInterface' not found in /home/lafaamicps/www/symfony/vendor/sonata-project/user-bundle/Model/GroupManagerInterface.php:26 Stack trace: #0 {main} thrown in /home/lafaamicps/www/symfony/vendor/sonata-project/user-bundle/Model/GroupManagerInterface.php on line 26