Fatal error: Uncaught Error: Class "Symfony\Contracts\EventDispatcher\Event" not found in /home/ntpcbgtpp/public_html/mat1/vendor/nelmio/security-bundle/src/ContentSecurityPolicy/Violation/ReportEvent.php:18 Stack trace: #0 {main} thrown in /home/ntpcbgtpp/public_html/mat1/vendor/nelmio/security-bundle/src/ContentSecurityPolicy/Violation/ReportEvent.php on line 18