I am getting a 401 response when hitting the Power BI login page! https://app.powerbi.com/?noSignUpCheck=1
We are experiencing this issue as well.
Our embedded reports fail to render with a 401 on the app.powerbi.com/embedReport call, and app.powerbi.com returns a 401.
This issue is customer facing for us, so clearing the cache or advising them to use a different browser is insufficient.
Any help from the powerbi team would be greatly appreciated, thanks!