

Scrolling through their Discord, that particular mod doesn’t work on the latest version of the game as it’s long out of date. You aren’t likely to find another client or server that is hosting it with it actually working. Checking the mod listing page, it just claims untested on latest version.
Unfortunately a lot of the more useful information for the RaftModding ecosystem is all gated behind Discord.
I went ahead and made a few small edits to hopefully better explain things for most desktop environments if anyone else stumbles upon this thread.