[2023] Crash on Windows, might be related to latest reported Linux/Max crash

Danaos2736 said: Ironman, so only visual mods; also tried without any.

Disabling mods doesn't remove effects they have already had on the save game file. As you don't see this in an unmodded game, they may well be the cause here.

All you can really do is post this save in Bug Reports here for QA to look into. Then put it aside and try it as you see new game patches come out.