Piloting a forked experiment

URL of experiment: Pavlovia

Description of the problem: I am trying to pilot a forked survey, and getting the following error message:

I am a complete coding/Pavlovia rookie, so please break a potential solution down in the simplest of terms for me if known! :slight_smile:

What was the original survey or experiment? Please could you list the steps you took so someone can try to reproduce the error.