This happened, I have AAI updated to the latest version.

Failed to load mods: Krastorio2-spaced-out/data-util.lua:147: bad argument #1 of 2 to 'pairs' (table expected, got nil)
stack traceback:
[C]: in function 'pairs'
Krastorio2-spaced-out/data-util.lua:147: in function 'add_recipe_unlock'
...2-spaced-out__/prototypes/compatibility/aai-industry.lua:47: in main chunk
[C]: in function 'require'
Krastorio2-spaced-out/data-updates.lua:30: in main chunk

It seems that rollback to 1.3.6 makes things work.

+1, have this issue as well. AAI Industry got updated in this time as well so either of these caused this crash.

It seems that rollback to 1.3.6 makes things work.

Weird, i haven't changed anything about aii industry in last update

Attached is the error if this helps:

https://imgur.com/a/FP6tfqR v2.0.58

Thanks for making K2 compatible with SA by the way, such a fun way to replay the game moving on from pure vanilla.

It looks like PlanetsLib patches something?? that makes the mods play nice, and removing the dependency is triggering the crash.
Re-adding it in info.json lets the game run without issue.

Adding one more data point- I CAN load the game with PlanetsLib + K2SO, its just when AAI Industries is enabled something goes wrong. This is with all mods fully updated on the latest current experimental build of Factorio.

The same error persists in 1.3.8
https://imgur.com/a/poEgRmT

Edit- nevermind