Fatal error: Uncaught Error: Interface 'Symfony\Component\Security\Core\User\UserCheckerInterface' not found in /home/soh-works/www/Stepup_test/vendor/symfony/security-core/User/UserChecker.php:24 Stack trace: #0 {main} thrown in /home/soh-works/www/Stepup_test/vendor/symfony/security-core/User/UserChecker.php on line 24