While uploading the project on Pavlovia, I am getting this error. Additionally, every time I am running the experiment after closing Psychopy sessions, its creating new project on Pavlovia. So maybe the error lies in the syncing of Pavlovia and Psychopy. But I am not able to resolve the error.
This error looks similar to this error - flagging incase it might be the same solution! (log into pavlovia within PsychoPy itself).