"The Experiment Failed to Load" issue when preloading images on Pavlovia

[Yaren Koca]

Hi,

Hope you are all doing well and staying safe. :)

I set up an experiment on Pavlovia (it is on Piloting) and I have several images to be preloaded. When run locally, I have no problems, however, on Pavlovia, it's giving me a very hard time. It takes multiple refreshes to have it stop giving that error, and sometimes, even several refreshes do not solve the issue. My max_load_time parameter is set to 30k so I don't think the time runs out. The error appears a lot sooner than 5 minutes anyways. Here's what I see in the console when that happens:

jspsych.js:2559 Uncaught TypeError: Cannot read property 'style' of null

    at update_loading_progress_bar (jspsych.js:2559)

    at Image.img.onload (jspsych.js:2411)

I posted the same issue on PsychoPy discourse forum (https://discourse.psychopy.org/t/experiment-failed-to-load-while-image-pre-loading-with-jspsych/18171). I did not try to convert the images to PNG/JPG yet as suggested, but I still don't think this is going to solve it completely. I ran a couple experiments before with smaller stimuli sets and ran into the same issue. As a solution, I told my participants to refresh the page multiple times but I don't want to do that anymore as I cannot afford losing any data this time.

Any help would be highly appreciated. If you need me to provide anything to help solve this issue please let me know.

Best