Phaser 3 / Capacitor iOS Sound test

Testing steps

npm i npm run watch

This will open a browser on http://localhost:10001 where you will see an image of a green face.

Clicking on it should generate an explosion sound.

Press ^C in the terminal to continue with the next steps.

npx cap add ios npx cap copy ios npx cap open ios

This will open Xcode.

In the top bar, just right of the play/pause buttons, there is a dropdown with devices.

Pick a device, e.g. iPhone 8, and click the play icon.

This will open a Simulator, where the sound test is opened as an app.

For some reason, clicking the green face does not give any sounds.

If you look at the console log in Xcode, you will see something like this:

Error: There is no audio asset with key "boom" in the audio cache

⚡️ URL: capacitor://localhost/game.js

So the code could find the image asset (the green face), but not the sound asset (the boom sound). Why?