List Index Out Of bounds (-1) - AI Editor

[DragonFly]

Everytime I press the save button on trigger types, script types, team types and task forces I get "List Index Out Of Bounds (-1)" even if I simply changed something (Like make a taskforce have 6 tanks instead of 4)

Whatever I made/Changed is not saved but the programme continues running. But as the changes are not saved it means it is impossible to edit the AI at all useing this program...

I'm pretty sure other people have this program working so I was wondering what the solution to this problem is.