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