Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\EventListener\AbstractSessionListener" not found in C:\Apache24_x64\htdocs\new-vak_bak\vendor\symfony\http-kernel\EventListener\SessionListener.php:30 Stack trace: #0 {main} thrown in C:\Apache24_x64\htdocs\new-vak_bak\vendor\symfony\http-kernel\EventListener\SessionListener.php on line 30