Fatal error: Uncaught Error: Interface 'FOS\UserBundle\Model\GroupInterface' not found in /home/lafaamicps/www/symfony/vendor/friendsofsymfony/user-bundle/FOS/UserBundle/Model/Group.php:17 Stack trace: #0 {main} thrown in /home/lafaamicps/www/symfony/vendor/friendsofsymfony/user-bundle/FOS/UserBundle/Model/Group.php on line 17