Fatal error: Uncaught Error: Interface 'Composer\Plugin\PluginInterface' not found in /srv/www/c5www/html/updates/concrete5-8.5.1/concrete/vendor/mlocati/composer-patcher/src/Plugin.php:20 Stack trace: #0 {main} thrown in /srv/www/c5www/html/updates/concrete5-8.5.1/concrete/vendor/mlocati/composer-patcher/src/Plugin.php on line 20