"Unknown resource" when using wav files online

Same problem. I’d really like to use uncompressed audio, but I keep getting

  • when getting the value of resource: html/resources/adaptive_sounds/lblock_trial1_diff8.wav
  • unknown resource

The file structure is right and works locally.

Willing to use mp3 if necessary, but I’m skeptical about the hypothesis that Chrome somehow doesn’t support wav files.

UPDATE: Now I’ve replaced the wav files with mp3, but it seems to do the same thing:

  • when getting the value of resource: html/resources/adaptive_sounds/lblock_trial1_diff8.mp3
  • unknown resource

…so I must be running into a problem for a different reason. Here is the project: