It is a symptom of a script that is trying to access https://kolmafia.us. That needs to change to https://kolmafia.us. If it is Harvest then ping the maintainer to update it. Make sure your copy of zlib is up to date, in case Harvest, or something else, is using it. It goes without saying that you also need a very recent version of mafia.
Sorry to be dense, but can you explain the difference in those two links? They look identical to me, and seemed to take me to the same place.