Fatal error: Uncaught Error: Interface "Symfony\Component\Security\Core\User\UserCheckerInterface" not found in /home/safi/websites/smartelio/shopware/vendor/symfony/security-core/User/ChainUserChecker.php:16
Stack trace:
#0 {main}
  thrown in /home/safi/websites/smartelio/shopware/vendor/symfony/security-core/User/ChainUserChecker.php on line 16