Fatal error: Uncaught Error: Interface "Symfony\Component\Routing\RouterInterface" not found in C:\Apache24\htdocs\cms_upgrade\vendor\symfony-cmf\routing\src\ChainedRouterInterface.php:19 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\cms_upgrade\vendor\symfony-cmf\routing\src\ChainedRouterInterface.php on line 19