No audio & video

This is the first time I setup Jitsi.

I’m running Ubuntu on a VPS.

I used the instructions on https---jitsi.github.io/handbook/docs/devops-guide/devops-guide-quickstart, except that I already had a Let’s Ecrypt certificate installed and I slightly changed the nginx configuration for that because this VPS instance is also hosting other services. But besides that everything is setup as documented.

I noticed that when participants join the meeting there are no video or audio.

I also see these errors in the browser’s console:

Connecting AudioNodes from AudioContexts with different sample-rate is currently not supported. [TrackVADEmitter.js:104:47](webpack://JitsiMeetJS/modules/detection/TrackVADEmitter.js)

2021-03-19T14:39:08.498Z [JitsiMeetJS.js] <getGlobalOnErrorHandler>: UnhandledError: AudioContext.createMediaStreamSource: Connecting AudioNodes from AudioContexts with different sample-rate is currently not 

and when someone joins…

2021-03-19T14:42:21.109Z [JitsiMeetJS.js] : UnhandledError: Strophe: _initWebSocket@…
and then the following error repeats:

2021-03-19T14:42:31.092Z [JitsiConference.js] <ie.prototype._init/this.e2eping<>: Failed to send E2E ping request or response. undefined

You can check it out for yourself at https://meet.family.net.za

Besides nginx everything else is the standard configuration out of the box. Any advise?