Fatal error: Uncaught Error: Interface "Symfony\Component\Security\Core\User\UserCheckerInterface" not found in /home/projetwewv/www/licence00/monapp/vendor/symfony/security-core/User/InMemoryUserChecker.php:21 Stack trace: #0 {main} thrown in /home/projetwewv/www/licence00/monapp/vendor/symfony/security-core/User/InMemoryUserChecker.php on line 21