Fatal error: Uncaught Error: Class 'Symfony\Component\Security\Core\Event\AuthenticationEvent' not found in /home/benjamincb/demos/acdg-site/vendor/symfony/security-core/Event/AuthenticationSuccessEvent.php:14 Stack trace: #0 {main} thrown in /home/benjamincb/demos/acdg-site/vendor/symfony/security-core/Event/AuthenticationSuccessEvent.php on line 14