Hi Przemyslaw, could you please try with old MyFaces (before upgrade)?
I think this is related rather to update of MyFaces to 2.1.6.
I updated from Myfaces 1.2 and RF 3.3.2. Before update it works.
I tested with RF 4.2 and Myfaces-2.0.2 and also does not work. After click on the link still see this error.
Could you try reproduce this problem?
Additionally: <h:commandLink> works inside <rich:tooltip>.