Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\EventListener\AbstractSessionListener" not found in /home/davp2026/public_html/chat.davproject.com/vendor/symfony/http-kernel/EventListener/SessionListener.php:23 Stack trace: #0 {main} thrown in /home/davp2026/public_html/chat.davproject.com/vendor/symfony/http-kernel/EventListener/SessionListener.php on line 23