Fatal error: Uncaught Error: Class 'Symfony\Component\EventDispatcher\EventDispatcher' not found in C:\xampp\htdocs\kmc\assets\ckfinder\core\connector\php\vendor\symfony\event-dispatcher\ContainerAwareEventDispatcher.php:24 Stack trace: #0 {main} thrown in C:\xampp\htdocs\kmc\assets\ckfinder\core\connector\php\vendor\symfony\event-dispatcher\ContainerAwareEventDispatcher.php on line 24