The live event is over already. But we can't still download it. And your point is wrong too. Netflix natively doesn't allow to download any of their videos. That is why they have DRM for each and every single video whether it is live or vod.
1binary0
I can explain this reason why it is not downloading, this is because the event that was just streamed live takes 2 day for Netflix to take the stream and convert it to the play version.
They first still need to edit the stream from commercials/sponsers etc. to a clean play version. After 48 hours it is able to fully download normally. ;)
This is the normal way of Netflix on how they do this.
This has nothing to do with netflix allowing downloads or not and or nothing to do with streamfab.

so besides the 48 hours as a extra info, as you can see it works fine here maybe update your SF to 6.2.1.5.