I tried downloading them several times, several hours apart, and I was able to download two other entries from this jam in the meantime. So I think it does seem to be something that affects this entry and not all of itch.io. It seems I get a connection error, but only on this game. Perhaps I could try installing the itch.io app and seeing if I can download it with that, or I could try using another browser (I usually use Firefox)… I did manage to download another Godot-based entry (Summoned) several days ago.
Actually, I think I managed to solve the mystery: It’s because of a weird issue between itch.io and Godot 4 (and apparently it happens in Firefox but not in Chrome). When you enable SharedArrayBuffer support, it changes some things so that the game can run properly in web browsers, but apparently that can break the download button. I don’t know for certain what Summoned might have done differently to get around that issue (it could be that because it’s enabled donations its download button isn’t on the same page as the web build… I guess the closest you might be able to do without enabling donations would be to add a devlog where you leave the game files attached… I might test that on another game tomorrow).