Chome updated so that audio cannot play without a click or tap first. This broke audio in c2 games as well as html5 games everywhere. About 5 versions ago c2 included a fix, but a tap or click is still needed.
Maybe Firefox followed suit with chrome. Idk.
In short you need the latest c2 to for audio to work in the latest chrome. The game still need a tap or click first though.
Audio will work as before if you use older versions of c2 before the fix with older versions of chrome before the change.
At least that’s my understanding.