I get this error when I try to start any tutorial lessons from the tips&tricks menu. I.e. the train signalling tutorial, or any other of the interactive ones.
This happens on Vanilla + Better Air Filtering (i.e. no other mods involved).
Error while applying migration: Better Air Filtering: 0.1.1.lua
better-air-filtering/migrations/0.1.1.lua:1: bad argument #1 of 2 to 'pairs' (table expected, got nil)
stack traceback:
[C]: in function 'pairs'
better-air-filtering/migrations/0.1.1.lua:1: in main chunk
