Continuing issues with audio files on Safari

The following experiments seem to be failing to play mp3 files on Safari in 2021.2.3

The error is Decoding audio data failed as per this thread.

The solution in that thread was to convert to .wav but elsewhere the same error occurs with wav files.

I did think this might be related to:

psychoJS._serverManager.prepareResources([{name: conditionsFile,path: conditionsFile}]);

but dictation-sentences using Experiment Settings / Online instead of a coded solution.

The bit rate is 44.1KhZ 32 bit float. Here is a sample file.

Has anyone managed to solve playing mp3 files (or wav files) cross-Browser?