Pavlovia .wav Sound file error: Unknown Resource

URL of experiment:

Description of the problem:
When I started my experiment containing the sound files, I got the message below:

I’ve read your replies from other posts and tried adding ‘.wav’ but it still didn’t work. Do you have any advice?

By syncing your project, a html folder is generated. A resources folder should be created in that html folder.
You could try to move your sound files to that folder and resync the experiment. So your folder structure should be html/resources/soundFileXyz.

Did you already see this post: "Unknown resource" when using wav files online