Fatal error: Uncaught Error: Class "Symfony\Contracts\EventDispatcher\Event" not found in /home/astechc1/public_html/vendor/knplabs/knp-components/src/Knp/Component/Pager/Event/BeforeEvent.php:12 Stack trace: #0 {main} thrown in /home/astechc1/public_html/vendor/knplabs/knp-components/src/Knp/Component/Pager/Event/BeforeEvent.php on line 12