Forum:Spin Off Stories do not work

The SpinOff Stories work for a while, and then at the exact same spot, some will turn off, bringing up an error message. I'm unsure as to what the error message says (It's in Japanese) But for example, in the Side Story "The Assassin", it works up until the point where you are battling Granberia for the first time. As soon as you escape for her Scaly Foot Prison, an error message in Japanese appears, and if you close off the error message, it closes MGQ. If you click the equivalent of OK in the error message, it closes MGQ. What have I done wrong?