Several times its happen. Game crashed.

Modyfikacja Stormwall (1.4.4) spowodowała niemożliwy do naprawienia błąd.
Proszę, zgłoś ten błąd autorowi tej modyfikacji.

Error while running event Stormwall::on_nth_tick(20)
Stormwall/control.lua:798: attempt to index field '?' (a nil value)
stack traceback:
Stormwall/control.lua:798: in function <Stormwall/control.lua:685>

1.4.5 might fix this issue. Can you tell me what was happening (relating to this mod) at the time this crash occurred? I don't really understand yet why this crash could be happening...

I apologize for my English. The game crashed at different moments. Once when the robots were placing blueprints with stormwall, once during a big attack, once just like that when nothing big was happening (but there could be some small attack). Stormwall currently consumes only 10 MW so there are not too many of them compared to the size of the base (I have almost 100 thousand solar panels alone). I play on Rampant so the attacks are big and frequent. Before the last game crash I played for almost 2 hours.

After installing 1.4.5, the game ran without crashes for over 3 hours. I think the problem has been solved. Thanks :)