Hi, thanks for your answers. Today I tried:
1) To move save data from my account to my girlfriend's: it didn't work, because it her PS4 does not see the save game data.
2) To use the PS4 interface to invite her, instead of the game's one: it didn't work, but I think that it's a problem of mine, because I really don't know how to invite her to my session passing through the PS4 interface. Any hints?
3) I created a new game, created two default characters, invited her, skipped the intro and then loaded the game: IT WORKED. The only problems is that it is a very long procedure. Btw, at least it works. Better than nothing.
Thanks to all for your support. Regards.
