Fatal error: Uncaught Error: Class "Symfony\Contracts\EventDispatcher\Event" not found in /home/ntpcbgtpp/public_html/mat1/vendor/omines/datatables-bundle/src/Exporter/Event/DataTableExporterResponseEvent.php:23 Stack trace: #0 {main} thrown in /home/ntpcbgtpp/public_html/mat1/vendor/omines/datatables-bundle/src/Exporter/Event/DataTableExporterResponseEvent.php on line 23