I am having the same issue.
I notice your experiment will work if the URL is:
https://run.pavlovia.org/cc954/experiment/html/
That new URL form was posted in the following thread:
I am having the same issue.
I notice your experiment will work if the URL is:
https://run.pavlovia.org/cc954/experiment/html/
That new URL form was posted in the following thread: