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 ^^

It is now hopefully fixed :3
The mod is primarily aimed at vanilla game. So every testing is done with vanilla in mind.
This may lead to some conflicts with other mods.

The issue of being locked behind the mining "productivity 3" is caused by "space age" expansion (or any other mod that changes technologies),
since it updates some vanilla researches.
In vanilla the "mining productivity 4" is the last one and it is infinite.
But in "space age" this tech is removed and the "mining productivity 3" is the last one and infinite.

I'm surprised that factorio was able to let you play the game, since it can detect when a technology is in a loop (circular dependency), so this should be also able to detect.