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Stimuli don't show but data are collected

I created a study in Builder and it runs just fine (no errors) but doesn’t actually show any stimuli on the screen. Rather than a black screen throughout the session, the screen seems to change colors with the different stimuli that should be showing up. I made key responses during my trials of the session and the data are being recorded (and accurately). How do I get my stimuli to show?

I have all the permissions that should be allowed on the Mac.

When I create a new experiment and put in just one image, it does show the image as expected.

The only error message I get is pasted below but from what I understand, it shouldn’t interfere with actually running the program.

python[68498:1691428] ApplePersistenceIgnoreState: Existing state will not be touched. New state will be written to (null)

I’m using Catalina 10.15.7 and PsychoPy v2020.2.8.

I think that you have a scale issue. What have you put in the size field of your image component? I suspect that you have put large numbers (which would work for pixels) but your experiment is in height units (so your sizes should be less than 1).

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Thank you! I had tried that but clearly didn’t use small enough numbers. It now works!