问题 I am trying to learn WebRTC, I had achieved connecting two RTCPeerConnection in same page and I am now attempting to separate them into two separate pages and connects them. However, after code are written and exchanged offer and answer, I noticed addIceCandidate() on initiator.html will always throw this with null argument Error at addIceCandidate from queue: TypeError: Failed to execute 'addIceCandidate' on 'RTCPeerConnection': Candidate missing values for both sdpMid and sdpMLineIndex at