Fatal error: Uncaught Error: Class 'FOS\UserBundle\Model\GroupManager' not found in /home/lafaamicps/www/symfony/vendor/friendsofsymfony/user-bundle/FOS/UserBundle/Doctrine/GroupManager.php:18 Stack trace: #0 {main} thrown in /home/lafaamicps/www/symfony/vendor/friendsofsymfony/user-bundle/FOS/UserBundle/Doctrine/GroupManager.php on line 18