Pages won't load

[King_of_Hearts]

The game was working for me a few hours ago, but now it just won't load. I go to any one of the games (e.g. Person), and click it, and it just displays a white screen with "Looking for random item that could be a person..." on it which never changes.

Inspecting the source, it appears that it's trying to fetch https://tools.wmflabs.org/wikidata-game/api.php?user=King+of+Hearts&action=get_candidate&table=potential_people which just refuses to load.