Error viewing users from external system belonging to a group

When I am going to see some member who belong to a group from cms I got whitepage and I got that exception. I attached the screen when I got an exception.
[INFO] [talledLocalContainer] 09.09.2013 17:54:55 ERROR [org.hippoecm.frontend.service.render.AbstractRenderService.onComponentTagBody():546] runtime plugin failure
[INFO] [talledLocalContainer] org.apache.wicket.markup.MarkupException: Unable to find component with id 'role' in [MarkupContainer [Component id = 0]]. This means that you declared wicket:id=role in your markup, but that you either did not add the component to your page at all, or that the hierarchy does not match.