Fatal error: Uncaught Error: Class "Composer\Command\BaseCommand" not found in C:\Apache24\htdocs\cms_upgrade\vendor\drupal\core-composer-scaffold\ComposerScaffoldCommand.php:17 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\cms_upgrade\vendor\drupal\core-composer-scaffold\ComposerScaffoldCommand.php on line 17