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