Fatal error: Uncaught Error: Interface "Symfony\Cmf\Component\Routing\ChainRouterInterface" not found in C:\Apache24\htdocs\cms_upgrade\vendor\symfony-cmf\routing\src\ChainRouter.php:33 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\cms_upgrade\vendor\symfony-cmf\routing\src\ChainRouter.php on line 33