Edit: never mind, this seems to have been a temporary glitch - they're working fine now.
Some of my old questions, such as Paint Starry Night, objectively, in 1kB of code or Write Moby Dick, approximately have large numbers of really great answers and still occasionally get answers today. I used to use the leaderboard snippet to keep track of the scores, but I found today that it's not working any more - no lists of scores come up when I run it.
I didn't find a previous meta post about this. Has something changed that stops the snippet from working, and if so, is there a way it can be fixed?