Managing personal Outlook.com account settings, security, and privacy
Same problem appeared here few days ago. Using IE11.
If I use Chrome, it works.
Also, it is not a IE11 issue, because it also does work using IE11 InPrivate mode!
I solved by doing a IE reset (options, advanced, reset settings), at the cost of losing all the customisation, passwords, and so on. Shame that MS was not able to help us on this one over so many years.
maTTeo