Hi Wakecarter,
I have been having the same problem with my experiment.This is not my first experiment on Pavlovia and I haven’t had problems before. I have followed the steps you mention, but no luck. I am using Psychopy version 2021.2.3. I have tried solutions given here, here, and here. Nothings seems to work. I’m at my wits end!
Can you help out? Link to my project.