Please upgrade to 2.2 here.
The 2.0 and 2.1 branches are no longer being updated.
Suggestion (unless I'm doing something wrong)
This discussion is related to the WhosOnline
I noticed that it looks like this addon -- which is otherwise great by the way -- shows a user as being online even if that user has logged out. If there was a way to change this, that'd be great (and more intuitive in my opinion).