The game is built using Twine 1 (v1.4.2) and the Sugar
Cube 2 (v2.11.0) story format.
Based on the error message you received I believe you are trying to build your version of the game using the Suger
cane story format that comes pre-installed with the application.
If this is the case then you will need to download the latest
You must be registered to see the links
from its website and install it, instructions on how to do that can be found in the
You must be registered to see the links
section of the documentation. Once you have installed SugarCube 2 you will need to use the
Story >
Story Format >
SugarCube-2 menu items to select it, and then build your version again.