I fixed everything and I've now finished the art. While the mod itself loads in and I can play as the base character, my art and changes aren't transferring over. I've tried deleting the autocompiled zip and reloading it, but it still won't work.
I'm trying to do this for DST, and unfortunately, I can't seem to find a compiler in any of my files. Do I have to download one? EDIT: I'm stupid. I realised that the way to get the Don't Starve Mod Tools were shown in the beginning of the video.