The reserch of the wood liquefaction can't be unlocked for me.
I think the problem is the prerequisites "mining-productivity-3" because level 3 is an infinite reserch.
I changed it on the "technology.lua" from => prerequisites = {"coal-liquefaction","automation-3","mining-productivity-3"} => To => prerequisites = {"coal-liquefaction","automation-3","mining-productivity-2"} and that worked.*
I have more than 57 mods on my game so this could be a bug / incompatibility but testing it would be real hasle on my side, sorry if i created this thead for nothing ^^