I had the same. I looked at it in chrome inspector and it turned out the reason was that I didn't allow the 2nd set of access rights, because it said it was optitional.
I didn't allow them and it still worked for me.
Flashblock?
I use both Adblock Plus and Better Popup Blocker. But both disabled/site allowed. :-/
Same for me on Chrome + MacOS. I opened it in incognito mode and it worked.