Fatal error: Uncaught Error: Interface "Symfony\Component\Security\Core\User\UserCheckerInterface" not found in /home2/zpcu9479/app.friwimap.com/vendor/symfony/security-core/User/ChainUserChecker.php:14 Stack trace: #0 {main} thrown in /home2/zpcu9479/app.friwimap.com/vendor/symfony/security-core/User/ChainUserChecker.php on line 14