Rated 1 out of 5 stars

Same problem from yesterday as Dom Wong and 3littlepigs. Luckily there are plenty of alternatives out there.

This review is for a previous version of the add-on (0.55). 

Bit.ly credentatials required

Bit.ly is no longer allowing calls to its API without login credentials hence this issues. You will need to create Bit.ly login credentials on bit.ly website. Please enter bit.ly login credentials In Add-on -> Shorten URL -> Options.
With this the add-on works as before.