YunoHost

Jitsi Meet

Fix for XMPP not working (reconnecting/reloading site)

systemctl stop metronome
systemctl disable metronome
systemctl restart prosody

Looks like YunoHost uses metronome and it will get re-enabled with updates but Jitsi needs prosody instead. Jitsi would stop metronome on install.

If that does not help just reinstall it.