Do you have a copy of the error code?
Hmmm, hard to say what the cause is then. I did have one thing reported which was similar to this in that section which I've fixed for the next update, but for this specific issue I can't really suggest an actual fix for the currently released version. What I will say though is that the "VN" version of the ghost hunt is largely the same content, just it basically does it for you, so if you just wanna see what happens in the ghost hunt and aren't worried about actually clicking around yourself, give that a try. (Assuming you made a save before the ghost hunt).
If it still breaks, you can skip the ghost hunt without consequence (It lets you choose if you guessed the ghost correctly) if you just wanna continue the game, but aside from that there's a possible fix in the next update when that's released if you just wanna wait. Up to you.