The answer is in the thread you linked to. You are trying to import the Python library random. It probably shows an error in your code component in Builder.
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This indicates a launch error , which is usually a syntax error in your JavaScript file that wasn’t caught by the checks during synchronisation, and may be in a Before Experiment code component tab. The most common cause for this error is that you are trying to import a Python library,…
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Select the Console tab at the top and errors item on the left to view errors.
Ignore the 404 error related to favicon.ico
Look for the error that appears on the main screen and click on the link next to Scheduler._currentTask. Take…
