WebRTC Uncaught Error: SyntaxError: DOM Exception 12 while peerConn.addIceCandidate [closed]

WebRTC Uncaught Error: SyntaxError: DOM Exception 12 while
peerConn.addIceCandidate [closed]

References

Reference NO 1

http://t6453.codeinpro.us/q/515028aee8432c04262ee5a4

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