Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\EventListener\AbstractSessionListener" not found in D:\Application\www\E-Tracking\vendor\symfony\http-kernel\EventListener\SessionListener.php:28 Stack trace: #0 {main} thrown in D:\Application\www\E-Tracking\vendor\symfony\http-kernel\EventListener\SessionListener.php on line 28