Reproduction is compiling a version of latest commit, and then trying to do /wynntils update. Then, get the following chat message.

It seems that the code here isn't working for some reason, since it allows me to proceed to the later "installation" parts:
https://github.com/Wynntils/Artemis/blob/3158eff0c515268aa57760d2a3e7cd695fa372fc/common/src/main/java/com/wynntils/commands/UpdateCommand.java#L24-L32

It doesn't seem to download anything though (maybe I'm looking in the wrong spot). I'm compiling for Fabric.

Do you actually run dev builds from run configurations or just compile builds with dev version? Latter is not a dev environment.

Yeah, the latter. Good to know, then.