The source code is unavailable because my server died, and the company I bought the hardware from haven't given any response, even though they receved it almost two weeks ago.

I pushed a fix after I saw your comment. (I never got a notification about Swede's comment, the problem was never mentioned in the Discord
linked to the "Ask Questions/Get Support" button, and the problem didn't affect servers with an existing configuration file, so I wasn't aware of the problem until half an hour ago)