I seem to not be alone in this issue but I cannot find the answer to my problem.
I am trying to connect PowerBI to Visual Studio Team Services. I use the same account for both and do not have any problems logging in to either application.
When in PowerBI I can follow the connection instructions up to the point where it tries to authourize the application. At this point I get the message: 'Failed to update source credentials'.
I have tried the various suggestions such as using an incognito window but I cannot get any further.