The FARL update from 1.0.8 to 1.0.9 caused a conflict with one of angel's mods (not sure if it's refining or petrochem), downgrading back to 1.0.8 fixed the issue for me.
Error is:
Failed to load mods: _ angelsrefining _/prototypes/override-functions.lua:395: attempt to index local 'parent' (a nil value)
