I'm sorry that my English level is not very good. I like this module very much. Thank you very much for making it. Everything is normal when I create a new game, but after I save, I will make an error when I read the game.
Error while running event supply-labs-with-construction-robots::on_init()
supply-labs-with-construction-robots/scripts/labs.lua:59: attempt to get length of local 'current_research_ingredients' (a nil value)
stack traceback:
supply-labs-with-construction-robots/scripts/labs.lua:59: in function 'random_tick'
supply-labs-with-construction-robots/scripts/labs.lua:126: in function 'every_minute'
supply-labs-with-construction-robots/scripts/labs.lua:120: in function 'on_research_changed'
supply-labs-with-construction-robots/scripts/labs.lua:30: in function 'init'
supply-labs-with-construction-robots/control.lua:9: in function <supply-labs-with-construction-robots/control.lua:5>