‘readPixels’ of undefined when running study online

Hi Jon:

Thanks for the suggestion. I think you are referring to uninstall my current version and reinstall the 2020.1, not just change version in experiment setting (which I have tried and doesn’t even sync…). My concern is that my tasks will break since a lot has changed between the two versions and I have many code components in my studies, which will be a much bigger problem.

So I am wondering if there’s anything else I can do. According to this post, can Alain back-port the fix of browser compatibility to earlier versions? If not all the way back to 3.1.0, which is the closest version that has been back-ported?

Thank you for all your help.