Fatal error: Uncaught Error: Class 'Symfony\Component\Security\Core\User\UserChecker' not found in /home/srv1clbr/public_html/sport43app/vendor/friendsofsymfony/user-bundle/Security/UserChecker.php:26 Stack trace: #0 {main} thrown in /home/srv1clbr/public_html/sport43app/vendor/friendsofsymfony/user-bundle/Security/UserChecker.php on line 26