Join multiple user to conference behind nat

My problem is with a few people joining the video conference.
How can I solve this problem when several people join the conference and I do not have their image and sound?

Thank you.

logs of jvb service:

WARNING: Received request for a nonexistent endpoint: 18d0463a
INFO: new Pair added: → (stream-1d78b8a0.RTP).
Feb 04, 2021 9:55:35 AM org.jitsi.utils.logging2.LoggerImpl log
INFO: Pair failed: → (stream-1d78b8a0.RTP)