I run a default, self-hosted Jitsi installation which I have setup according to Self-Hosting Guide - Debian/Ubuntu server.
Seemingly, everything works fine, but if I open the Javascript console, I see a lot of errors (and follow-ups) like this one:
BridgeChannel.js:86 WebSocket connection to 'wss://jitsi.my-domain.tld/colibri-ws/default-id/c065e3061b8d48c7/df02eb53?pwd=25jptsga3hludossi3n145f62f' failed: Error during WebSocket handshake: Unexpected response code: 404
That is comprehensible, because the Apache virtual host which has been setup by the Jitsi installation does not contain any proxy directive which would forward such websocket request to some listener.
How do I fix that problem?