save the progress of the game automatically?

I’m having trouble with…

The error I’m getting is:…

My code looks like this:

Hi. First of all, sorry for my English. I speak Spanish and I will try to understand it.
I am working on a game and although it seems simple what I am going to ask, I do not find useful links since all the links I pass through are down.
I need the user to save his game, simply save it and when he wants to return to the game, to continue from where he left it, or from the beginning of the scene where it was.
Nothing so complex, and although I read a lot about a complement called "autosave", I can't get it.
If someone can help me, I will be delighted.
Happy holidays from Argentina!

Have you checked these out there are multiple threads that post the same issue.

Dashingdon hosts choicescript and also has a save feature