Fatal error: Uncaught Error: Class "Sensio\Bundle\FrameworkExtraBundle\EventListener\HttpCacheListener" not found in C:\xampp\htdocs\electronica\vendor\sensio\framework-extra-bundle\EventListener\CacheListener.php:23 Stack trace: #0 {main} thrown in C:\xampp\htdocs\electronica\vendor\sensio\framework-extra-bundle\EventListener\CacheListener.php on line 23