Path issue wav and jpg files

I uploaded my working experiment to Pavlovia, but when trying to pilot the study, I receive an error message (see below in the picture). The pilot starts and works up to the point where the audio and image files are needed.
Does someone know what my problem might be or have an idea how to fix it?
Thank you for your help!

Did you find a solution yet? I have the same issue.

Yes,
one problem I had was that my audio files were not in the html folder, so I added them manually on my desktop and resynced the experiment.
another problem that I had was that the # in my filenames could not be read by the java script, so I had to change the file names.