Dokuwiki安装插件错误

Dokuwiki安装插件导致z这个错误怎么办？
Fatal error: Declaration of action_plugin_indexmenu::register(&$controller) must be compatible with dokuwiki\Extension\ActionPlugin::register(Doku_Event_Handler $controller) in D:\phpstudy_pro\WWW\wiki2\lib\plugins\indexmenu2\action.php on line 123