Fatal error: Uncaught Error: Class "Symfony\Component\Routing\RouteCollection" not found in C:\Apache24\htdocs\cms_upgrade\vendor\symfony-cmf\routing\src\LazyRouteCollection.php:18 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\cms_upgrade\vendor\symfony-cmf\routing\src\LazyRouteCollection.php on line 18