Impossible to use jitsi

First of all, sorry for the “too generic” title, but I can’t be more precise on the problem.

I’m testing the jitsi meet api to embed jitsi on a website but I can just chat with the other person.

So I went to test directly the meet.jit.si, but I face the same problem.
When just one user is in the room, seems to work ok.
As soon I connect the second user (pc) this is what I have:

  • Both users windows are displayed (just the icons no video)
  • the little connection indicator on the “other fellow user” on both pcs becomes grey (connection lost)
  • I cannot see/hear the other person (mic and camera icons are striked)
  • I cannot share screen
  • I CAN chat from both users/pc

The console from my test directly on meet.jit.si:
2020-04-25 [modules/RTC/TraceablePeerConnection.js] <C.prototype.addTrack>: add LocalTrack[1,audio] to: TPC[1,p2p:false] lib-jitsi-meet.min.js:10:26270
2020-04-25 [JitsiMeetJS.js] : UnhandledError: Script error. “Script: https://web-cdn.jitsi.net/meetjitsi_4046.701/libs/lib-jitsi-meet.min.js?v=4039.692” Line: 0 Column: 0 StackTrace: null lib-jitsi-meet.min.js:10:26270
s https://web-cdn.jitsi.net/meetjitsi_4046.701/libs/lib-jitsi-meet.min.js:10:26270
getGlobalOnErrorHandler JitsiMeetJS.js:612:8
window.onerror middleware.js:100:12
2020-04-25 [modules/statistics/CallStats.js] <_reportError>: No error is passed! lib-jitsi-meet.min.js:10:26270 TypeError: this.pc.peerconnection.getTransceivers is not a function[Learn More] TPCUtils.js:341:28
2020-04-25T14:05:40.537Z [modules/RTC/RTCUtils.js] <_newGetUserMediaWithConstraints/</<>: onUserMediaSuccess

PS I also tried to connect one pc from another location (another home) but no luck.
What am I doing wrong??

Tried on Firefox and Waterfox latest versions.

Thanks!