Thanks for the report! As I don't have SA, I need some help to figure things out. Please insert these lines in scripts/forces.lua directly after line 231:
minime.show("mod.player_data", mod.player_data)
minime.show("mod.force_data", mod.force_data)
Then go to the main menu --> Settings --> Mod settings --> Startup, enable the setting "Write debugging output to log file", restart the game,  reproduce the crash, and upload the log file somewhere where I can fetch it without having to register. If you're on the forums, you can also send it to me in a private message.