Failed to load mod "robot_tree_farm_update": robot_tree_farm_update/data-final-fixes.lua:523: attempt to index field 'autoplace' (a nil value)
stack traceback:
robot_tree_farm_update/data-final-fixes.lua:523: in main chunk

i fixed it in my local copy by adding a "if prototype.autoplace then" clause around those lines dealing with prototype.autoplace.control

Well done. But how can this be? Are you using any mod that adds trees that aren't autoplaceable?

I use a bunch of tree related mods to test my WoodHarvester mod to deal with everything.

I don't know if some or which of them cause the problem. I use alien-biomes which introduces several trees and Noxys_Trees which let trees grow randomly in the wild.

Other tree related mods are not currently active.

Ok, so it's not Noxys_Trees, as I am using it too.
The culprit is alien-biomes which disables some trees by deleting autoplace.
I released a fixed version (1.3.6).
Thanks for reporting this.