This error occurs when navigating to the Twitch settings in preferences, and attempting to login to Twitch account. Prompted for username and password, and press login, and I am returned with this redirect in the same window :
This is just printed inside the window, like it's a poorly formatted api callback, preventing me from authenticating with Twitch on any server that I select.
We're currently working on this issue and hoping to get it resolved soon. We apologize for the inconvenience.
Not terribly worried about it right now :) Is this a problem with the API callback, or is the application actually failing to create the connection to authenticate?
I haven't been given much details on it to be honest since I've been chasing other bugs, but it honestly could be either. I'll probably get more details once it's actually resolved.