What did you do to make it work?Works now, thanks!
https://blog.twitch.tv/client-id-requir ... .gxng7j87j
I don't use livestreamer.exe but that's why, you should check with the developer to see if they've made an update for that
Edit: https://github.com/chrippa/livestreamer/issues/1456 - try to follow dhelfrich's advice