Failed to load mods: pypostprocessing/data-updates.lua:28: attempt to call global 'RECIPE' (a nil value)
stack traceback: pypostprocessing/data-updates.lua:28 in function 'set_underground_recipe'
--pypostprocessing__?data-updates.lua:33 in main chunk
Sorry, I was playing with pyanodons and accidentally set pypostprocessing as a required dependency rather than an optional one. Fixed in latest release.