Fatal error: Uncaught Error: Interface "Symfony\Component\Security\Core\User\UserCheckerInterface" not found in /home/www/aes-demo/api-8.0.0#316/src/Security/UserChecker.php:15 Stack trace: #0 {main} thrown in /home/www/aes-demo/api-8.0.0#316/src/Security/UserChecker.php on line 15