Fatal error: Uncaught Error: Class "Symfony\Component\EventDispatcher\Event" not found in /home/authent1/public_html/listassorys/phpbb/vendor/symfony/http-kernel/Event/KernelEvent.php:23 Stack trace: #0 {main} thrown in /home/authent1/public_html/listassorys/phpbb/vendor/symfony/http-kernel/Event/KernelEvent.php on line 23