I just found this issue and was about to start a new thread to ask about it when i found this thread. Hopefully it gets resolved very soon as many of us have used that option to see our stats time to time and having it disabled makes it quite uncomfortable.
I might've figured it out. A bunch of things are currently disabled; I'll work on safely enabling them in the coming days.
It's been a few days already as this topic was started on 18th, and today it is already 24th of Dec. We are still waiting to have the problem resolved ASAP.