Spreed.me - everything working but sound

Yesterday I installed spreed.me on Debian following a guide on these forums and everything is working apart from sound.

I can connect to the webrtc server from within Nextcloud, I can invite other people and initiate calls. Video works (at least on my end) and I can see the green bar moving below the call info showing the mic is picking up sound but the other person in the call cannot hear me and I cannot hear them.

I have tried multiple settings for the different audio devices I have but nothing seems to work. Does anyone have any ideas?

Thanks in advance.

Most likely a problem related to your / your participant’s network setup.

Have you tried to use a TURN server?