Audio and video missing after the second participant joining


I’m new to jitsi. I install jitsi on AWS EC2 using docker, referring to this guidelines

The installation went well and I have opened all necessary ports as well.

When I tried simple test using different browser on the same computer, it works well. But when both users are from different device and different network, the video call didn’t work at all. The second participant was able to join, but no video and audio at all.

I have tried with and without STUN server. Both are having the same issue.

Not sure what is the problem here. Appreciate if anyone can help with this issue.

Thank you.

Make sure you open udp 10000 in the security group of the instance.