That's pretty weird (could maybe happen if the download got corrupted?), but if you reinstall Don't Starve it will clear out the mods so you can at least tell if that's the issue (your saves will stay, they're stored in Documents and on the steam cloud). If you want you can also try to delete it manually, if you go into the game's properties in Steam, local files, browse game files, in the mods folder the folder for this one should be workshop-449529458. It'll only redownload it if you're still subscribed and open the mods menu.

引用自 rezecib：

That's pretty weird (could maybe happen if the download got corrupted?), but if you reinstall Don't Starve it will clear out the mods so you can at least tell if that's the issue (your saves will stay, they're stored in Documents and on the steam cloud). If you want you can also try to delete it manually, if you go into the game's properties in Steam, local files, browse game files, in the mods folder the folder for this one should be workshop-449529458. It'll only redownload it if you're still subscribed and open the mods menu.

I'll try reinstalling the mod.
Edit: it worked :)