I have been getting an empty page too, I think the server / site is down. I got 1 put in just after midnight CDT (UTC-5) and the next one (several actually) wouldn't go anywhere, so I'm keeping a list of the profiles I'm sourcing so I can go back to them and edit (put a space somewhere) and try the challenge button again once the site is back up. I wish I knew a page on Wikitree that we could go to to get updates.
