Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\EventListener\AbstractSessionListener" not found in /home/slsiluser/public_html/service-portal-mobile-responsive/vendor/symfony/http-kernel/EventListener/SessionListener.php:29 Stack trace: #0 {main} thrown in /home/slsiluser/public_html/service-portal-mobile-responsive/vendor/symfony/http-kernel/EventListener/SessionListener.php on line 29