Error Unfortunately we encountered the following error: ReferenceError: os is not defined Try to run the experiment again. If the error persists, contact the experiment designer

[wakecarter]

Have you removed html from the output path? The link in your first post has /html/ in it.

Wakefield's Daily Tips

Output path should be blank In PsychoPy version 2020.1, the files needed for running an experiment online were created in a sub-folder of the experiment folder, usually called html, along with copies of any necessary resources (spreadsheets, media files, etc.). Since version 2020.2.0 this has no longer been necessary, which saves on server space. More recent versions of PsychoPy will fail with resource errors if you try to use an output path. Delete the contents of Experiment Settings / Online…