Fatal error: Uncaught Error: Class 'Composer\Command\BaseCommand' not found in /home/devmecseminars/public_html/mec/vendor/drupal/core-composer-scaffold/ComposerScaffoldCommand.php:17 Stack trace: #0 {main} thrown in /home/devmecseminars/public_html/mec/vendor/drupal/core-composer-scaffold/ComposerScaffoldCommand.php on line 17