Hi,
During the start of the game (with the Krastorio2 mod) the following error occurred (it concerns the new version 1.1.6 of this mod):

Error while running event levelup-forked::on_nth_tick(6)
levelup-forked/control.lua:84: bad argument #1 of 2 to 'randomseed' (number expected, got nil)
stack traceback:
[C]: in function 'randomseed'
levelup-forked/control.lua:84: in function 'qualityUpgrade'
levelup-forked/control.lua:145: in function 'get_buildings'
levelup-forked/control.lua:174: in function <levelup-forked/control.lua:172>

Just to be on the safe side, I loaded the game and repeated the action, and the error occurred again.

Hey,
I couldn't replicate this issue, however I've added some extra checks that should hopefully fix the issue -

New release tested with All The Overhauls modpack (SE, K2 and more) and it loaded up well

I first disabled the mod, then played for a while, and then restarted game with the mod. This allowed me to work around issue.
After 1.1.7 update and loading game, the error didn't appear. Thanks for solving it, thanks for your work!

+1 on an error similar to this . I'm playing the spagettorio modpack with dozens of small mods too(around 190 mod) . Doing absolutely nothing of the ordinary, just making buildings.

https://imgur.com/wRKIIbq

It works now like a charm! Thanks for the fast update :D