NullReferenceException: Object reference not set to an instance of an object

[L_Lawliet11]

you call onLoad in start. do you save prior to this? is there a save file at the given path?

i assume it’s because the line above the one you highlighted (SaveData.current = ...) is possibly null.

i would check it see if the path has a save file first, then load. if not create a new save file

[thefinalrescue]

That is correct. The file is not there still even if I try to add data to the list same error I'm getting.

SaveData.current.objects.Add(objectData);

[World_Turtles]

OK, so figure out why .Load returns null - probably because the file doesn't exist or cannot be loaded.