openmeetings 5.0.0-M2 cam mic issue

[Juan Antonio Moreno Carmona]

HI

I have just installed Openmeetings and all seems works well but when I 
am in a room and any other user enters that room I can see him in the 
users list and give him moderator and whiteboard permissions but I can 
not see or hear him.

Their cam/audio frame is empty. I have uploaded image here.

https://pasteboard.co/IgKVLyK.png

Openmeetings 5.0.0-M2 is installed in a VPS with two cores and 4GB RAM 
with Archlinux OS and I don't know how to solve this. Perhaps, someone 
can help me.

Regards.