Hookpad doesn't play or make any sounds in linux Mint 21

Hello, I have started playing with Ardour in Linux Mint 21 and I like to use Hookpad to come up with ideas. I have tried to access the site from a modern versions of Firefox and Chromium. Most of the functionality works, I can load up old songs, I can insert notes and chords into songs, and even though everything seems to load properly when I hit play, nothing happens, and when I click no notes and chords I can’t hear any sound.

Is there anything I can try on my end or should I expect this to not work?

I am a long time supporter of the site, thanks for one of the coolest web apps out there!