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My environment was working well and suddenly it started to show some error. When a single user initiated the call and started to stream the call, then screen share and enable camera throws different error.

During screen share this error

If i enable the camera then this error

Additionally I found this other message when I initiate streaming
2021-12-15T18:37:37.315Z [modules/xmpp/strophe.util.js] <Object.r.Strophe.log>: Strophe: Error: Failed to construct ‘RTCPeerConnection’: Plan B SDP semantics is a legacy version of the Session Description Protocol that has severe compatibility issues on modern browsers and is no longer supported. See [WebRTC] Deprecate and Remove Plan B - Chrome Platform Status for more details, including the possibility of registering for a Deprecation Trial in order to extend the Plan B deprecation deadline for a limited amount of time.

Hi, you need to upgrade to latest jitsi versions to fix this. Plan B is removed in new browser version

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