Fatal error: Uncaught Error: Class "Symfony\Component\Routing\Loader\AnnotationClassLoader" not found in C:\xampp\htdocs\electronica\vendor\sensio\framework-extra-bundle\Routing\AnnotatedRouteControllerLoader.php:27 Stack trace: #0 {main} thrown in C:\xampp\htdocs\electronica\vendor\sensio\framework-extra-bundle\Routing\AnnotatedRouteControllerLoader.php on line 27