Fatal error: Uncaught Error: Class 'Drupal\Composer\Plugin\Scaffold\Operations\AbstractOperation' not found in /home/devmecseminars/public_html/mec/vendor/drupal/core-composer-scaffold/Operations/AppendOp.php:14
Stack trace:
#0 {main}
thrown in /home/devmecseminars/public_html/mec/vendor/drupal/core-composer-scaffold/Operations/AppendOp.php on line 14