The Unknown Resource Error - uploading default.png did not work

URL of experiment: Pavlovia

Description of the problem:

Hi, I forked a Simon task on Pavlovia and only edited the questions at the beginning of the experiment with PsychoPy v2023.2.3. The experiment runs well locally. However, when I upload it to Pavlovia, there is an error message about unknown resources as below.

I checked the forum and tried to upload an image named ‘default.png’ to the folder and through the resource manager of PsychoPy, but that did not work out.

How can I solve this issue?

Thank you so much for your help!