Their site is broken, maybe on purpose (although the Hanlon's razor and wide experience with their broken standards, non-conformant hardware, lack of drivers, suggests that MS just lacks good engineers). The problem is that it shows empty page for most (all?) browsers except of Internet Explorer.
How did I know it? I assumed it because in ancient past existed sites that only worked with Internet Explorer, so I installed addon to fake user agent, made it to look like IE8, and — voilà — site suddenly works!
To solve the problem you have to do the same. Also, I'd highly recommend to create a forum topic about the problem on MS site (so that the problem was publicly known by MS), and, perhaps, send a bug-report to MS support.
MS is known to have bad support for many apps (skype, drivers, just out off top of my head), so I'd also recommend to check an alternative to One Note (I can't adice it myself, because I didn't use anything like this, but linked suggestions are highly upvoted, perhaps worth a try; or, at least, leaving a comment what do you miss. And remember, those apps are FOSS, so you can easily find their bugtracker, and create a new "feature request" there.).