No Audio and no video starting October 1st, 2020

I need quick help.
Im using jitsi meet for a classe room at school. I m runing jitsi meet on an Ubuntu 18.04 server and everything was fine until October 1st 2020 (yesterday), jitsi meet keeps:
1- Getting diconnected
2- when connected via mobile (4G network), no audio and no video when more than 2 people are connected to the room
3- No audio and no video when connected with Work WIFI (Fiber Optic) no matter how many people are connected.
Thnaks