Reference error when running BART demo online

URL of experiment: balloon risk 3 [PsychoPy] (

Description of the problem: Hi All, I want to run a Balloon Analogue Risk Task (BART) demo online but every time I try to run it an error message appears that says “ReferenceError: balloonSize is not defined”. This confused me because it ran perfectly fine on the psychopy application on my laptop.

Im quite new to Pavlovia so any help would be much appreciated!