sorry for crying wolf earlier, i forgot to check for incompatibilities with other mods, :?
and i have now found the culprit. :twisted:
It was WrenchFu... :shock:
this mod creates a "tree" entity, with no "minable" field...
and since you are "replacing" the minable resources in order to add a ...

error on load
(using factotio 0.12.26 x64/ boblibrary_0.12.3)

data.lua:66
attempting to index FIELD:minable (nil value)

code on line 66:
tree.minable.result = nil

me no good lua...

(please fix!! )