Fatal error: Uncaught Error: Interface "Symfony\Component\Config\Resource\SelfCheckingResourceInterface" not found in C:\Apache24\htdocs\cms_upgrade\vendor\symfony\config\Resource\ReflectionClassResource.php:24 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\cms_upgrade\vendor\symfony\config\Resource\ReflectionClassResource.php on line 24