Hello!
It's unfortunate to hear that you're having technical difficulties with Blood Price!
I've read the information you've shared, and will get in touch with the developers for a fix.
If you could also post a screenshot of the error to this thread, it would be much appreciated!
We apologize that a game error has gotten in the way of your enjoyment, and we will try to get a solution to you promptly.
-The Team at MediBang Global