Fatal error: Uncaught Error: Class "FOS\UserBundle\Doctrine\GroupManager" not found in /home/kakabapu/public_html/mysticker.kakabapu.com/vendor/friendsofsymfony/user-bundle/FOS/UserBundle/Entity/GroupManager.php:21 Stack trace: #0 {main} thrown in /home/kakabapu/public_html/mysticker.kakabapu.com/vendor/friendsofsymfony/user-bundle/FOS/UserBundle/Entity/GroupManager.php on line 21