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