Wonderful extention, but owner seems to be alseep :P Twitch API is changing and current extention doesn't support it. Starting on the 28th old API will be dead for good.
There is a new build on the github page though, see pull request #267 for the fixed version that you can install manually.

good addon. used for many years. but twitch changed their API so no longer works. seems like the dev is not maintaining it :(

The notification for who goes live works fine. But i wish it had notifications for whispers. If you put notifications for whispers i'll glad give u 5 stars