anyone else having trouble with the space matter furnace not working? I can't put anything in it. it even says possible inputs is nothing.

Same for me but it's still possible to progress in the game. I'm guessing the dev intends to add to this mod still.

Yes, something is broken. If remember it problem with no option to choose recipe in furnaces and as no ore in input to duplicate causes the issue. I had free time on winter brake to fix mod for my own use. Feel free to do your own spin of this mod, as I don't have time for factorio.