No video and Sound after new installation

Hi there,

I made a fresh installation on a vServer using Debian Buster (10.6), IPv4 and IPv6 are set up. Hostnames are also set up properly.

Packts installed are: sudo openvpn traceroute net-tools ntp cifs-utils rsync nfs-common acpid curlftpfs davfs2 ufw gnupg2 apt-transport-https resolvconf nginx-full
From other sources: adoptopenjdk-8-hotspot
At the end: jitsi-meet

Everything is working fine, but whoever joins only can see and hear himself.

In jvb.log (which is incredibly big) I find one prob every view lines:

WARNUNG: [2951] [hostname=localhost id=shard] MucClient$1.connectionClosedOnError#317: Closed on error:
javax.net.ssl.SSLHandshakeException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

I know that there were probs like that before and that they were fixed. Maybe I’m doing something wrong?

Would be thankfull for any idea …

Greetz
Martin

Have to apologize …

I’m working on Debian desktop and this is a pure Firefox Prob. Everything working fine in Chromium :pleading_face: :upside_down_face: