https://www.mediawiki.org/wiki/Topic:Vgzlz6axzxglnl91
Clicking "Mark as resolved" doesn't (no console error).
Navigating to https://www.mediawiki.org/wiki/Topic:Vgzlz6axzxglnl91?action=lock-topic&flow_moderationState=lock throws a DBQueryError (Xk8CjwpAIC0AAH9VHaoAAADV etc.).