Fatal error: Uncaught Error: Interface "Symfony\Component\Security\Core\User\UserCheckerInterface" not found in /home/astechc1/public_html/vendor/symfony/security-core/User/InMemoryUserChecker.php:24 Stack trace: #0 {main} thrown in /home/astechc1/public_html/vendor/symfony/security-core/User/InMemoryUserChecker.php on line 24