Fatal error: Uncaught Error: Class "Symfony\Contracts\EventDispatcher\Event" not found in /var/www/html/vendor/nbgrp/onelogin-saml-bundle/src/Event/AbstractUserEvent.php:11 Stack trace: #0 {main} thrown in /var/www/html/vendor/nbgrp/onelogin-saml-bundle/src/Event/AbstractUserEvent.php on line 11