Fatal error: Uncaught Error: Class "Drupal\Composer\Plugin\Scaffold\Operations\AbstractOperation" not found in C:\Apache24\htdocs\cms_upgrade\vendor\drupal\core-composer-scaffold\Operations\SkipOp.php:14 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\cms_upgrade\vendor\drupal\core-composer-scaffold\Operations\SkipOp.php on line 14