Fatal error: Uncaught Error: Interface "Composer\Plugin\PluginInterface" not found in /var/www/public/git/vendor/phpro/grumphp/src/Composer/GrumPHPPlugin.php:24 Stack trace: #0 {main} thrown in /var/www/public/git/vendor/phpro/grumphp/src/Composer/GrumPHPPlugin.php on line 24