Fatal error: Uncaught Error: Class 'Symfony\Component\HttpKernel\EventListener\AbstractTestSessionListener' not found in C:\xampp\htdocs\admin\vendor\symfony\http-kernel\EventListener\TestSessionListener.php:24 Stack trace: #0 {main} thrown in C:\xampp\htdocs\admin\vendor\symfony\http-kernel\EventListener\TestSessionListener.php on line 24