Fatal error: Uncaught Error: Interface "Composer\Plugin\PluginInterface" not found in /home/websupportontdem/public_html/uscabinetonline.websupportondemo.com/old/vendor/magento/composer-root-update-plugin/Plugin/PluginDefinition.php:29 Stack trace: #0 {main} thrown in /home/websupportontdem/public_html/uscabinetonline.websupportondemo.com/old/vendor/magento/composer-root-update-plugin/Plugin/PluginDefinition.php on line 29