dokuwiki\Exception\FatalException: Declaration of action_plugin_codebutton2::register(&$controller) must be compatible with dokuwiki\Extension\ActionPlugin::register(Doku_Event_Handler $controller)

An unforeseen error has occured. This is most likely a bug somewhere. It might be a problem in the d0d35f12850c21bc3baed8400c614b8b plugin.

More info has been written to the DokuWiki error log.