Okay, update, the liquefiers can liquefy asteroid chunks, but only if you use an inserter to insert to them - defeating the purpose of disabling inserters to use the mod in the first place.
I think there is simply a few missing items and entities that are valid for liquefiers to pull from, namely the Space Platform Hub, and so far, Asteroid Collectors.
Edit, on further checking, I believe liquefiers and solidifiers simply don't work very well on Space Platform surface, since even regular entities such as electric smelters which work fine with Liquefiers/Solidifiers on Nauvis' surface.