Fatal error: Uncaught Error: Class "Symfony\Contracts\EventDispatcher\Event" not found in /var/www/bethesda/vendor/knplabs/knp-components/src/Knp/Component/Pager/Event/BeforeEvent.php:12 Stack trace: #0 {main} thrown in /var/www/bethesda/vendor/knplabs/knp-components/src/Knp/Component/Pager/Event/BeforeEvent.php on line 12