Fatal error: Uncaught Error: Class "Symfony\Component\Config\Exception\LoaderLoadException" not found in C:\Apache24\htdocs\cms_upgrade\vendor\symfony\config\Exception\FileLoaderImportCircularReferenceException.php:19 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\cms_upgrade\vendor\symfony\config\Exception\FileLoaderImportCircularReferenceException.php on line 19