Fatal error: Uncaught Error: Class "Symfony\Component\Security\Core\Event\AuthenticationEvent" not found in /home/technoon/public_html/demo/yondy/vendor/symfony/security-core/Event/AuthenticationSuccessEvent.php:14 Stack trace: #0 {main} thrown in /home/technoon/public_html/demo/yondy/vendor/symfony/security-core/Event/AuthenticationSuccessEvent.php on line 14