Error on browser console

Hello guys,
sometimes, randomly, in my browser console I see error like these:

[Error] ERROR:Request has timed out in Request: method:receiveVideoFrom params:{“sdpOffer”:“v=0\r\no=- 3915319981802039743 2 IN IP4 127.0.0.1\r\ns=-\r\nt=0 0\r\na=group:BUNDLE 0 1\r\na=msid-semantic: WMS\r\nm=audio 52185 UDP/TLS/RTP/SAVPF 111 103 9 102 0 8 105 13 110 113 126\r\nc=IN IP4 192.168.1.163\r\na=rtcp:9 IN IP4 0.0.0.0\r\na=candidate:776999446 1 udp 2113937151 192.168.1.163 52185 typ host generation 0 network-cost 999\r\na=ice-ufrag:q6QE\r\na=ice-pwd:1ePMDZ9Gs1qG6HtIWY3/z6GA\r\na=ice-options:trickle\r\na=fingerprint:sha-256 ED:79:0F:E0:55:8E:37:15:A7:33:51:5B:20:A7:34:EC:81:0F:4C:DF:D4:EE:0F:05:6D:2D:C0:E9:C6:89:3A:68\r\na=setup:actpass\r\na=mid:0\r\na=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level\r\na=extmap:2 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time\r\na=extmap:3 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01\r\na=extmap:4 urn:ietf:params:rtp-hdrext:sdes:mid\r\na=extmap:5 urn:ietf:params:rtp-hdrext:sdes:rtp-stream-id\r\na=extmap:6 urn:ietf:params:rtp-hdrext:sdes:repaired-rtp-stream-id\r\na=recvonly\r\na=rtcp-mux\r\na=rtpmap:111 opus/48000/2\r\na=rtcp-fb:111 transport-cc\r\na=fmtp:111 minptime=10;useinbandfec=1\r\na=rtpmap:103 ISAC/16000\r\na=rtpmap:9 G722/8000\r\na=rtpmap:102 ILBC/8000\r\na=rtpmap:0 PCMU/8000\r\na=rtpmap:8 PCMA/8000\r\na=rtpmap:105 CN/16000\r\na=rtpmap:13 CN/8000\r\na=rtpmap:110 telephone-event/48000\r\na=rtpmap:113 telephone-event/16000\r\na=rtpmap:126 telephone-event/8000\r\nm=video 59788 UDP/TLS/RTP/SAVPF 96 97 98 99 100 101 127 125 104\r\nc=IN IP4 79.19.249.16\r\na=rtcp:9 IN IP4 0.0.0.0\r\na=candidate:776999446 1 udp 2113937151 192.168.1.163 59788 typ host generation 0 network-cost 999\r\na=candidate:842163049 1 udp 1677729535 79.19.249.16 59788 typ srflx raddr 192.168.1.163 rport 59788 generation 0 network-cost 999\r\na=ice-ufrag:q6QE\r\na=ice-pwd:1ePMDZ9Gs1qG6HtIWY3/z6GA\r\na=ice-options:trickle\r\na=fingerprint:sha-256 ED:79:0F:E0:55:8E:37:15:A7:33:51:5B:20:A7:34:EC:81:0F:4C:DF:D4:EE:0F:05:6D:2D:C0:E9:C6:89:3A:68\r\na=setup:actpass\r\na=mid:1\r\na=extmap:14 urn:ietf:params:rtp-hdrext:toffset\r\na=extmap:2 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time\r\na=extmap:13 urn:3gpp:video-orientation\r\na=extmap:3 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01\r\na=extmap:12 http://www.webrtc.org/experiments/rtp-hdrext/playout-delay\r\na=extmap:11 http://www.webrtc.org/experiments/rtp-hdrext/video-content-type\r\na=extmap:7 http://www.webrtc.org/experiments/rtp-hdrext/video-timing\r\na=extmap:8 http://tools.ietf.org/html/draft-ietf-avtext-framemarking-07\r\na=extmap:9 http://www.webrtc.org/experiments/rtp-hdrext/color-space\r\na=extmap:4 urn:ietf:params:rtp-hdrext:sdes:mid\r\na=extmap:5 urn:ietf:params:rtp-hdrext:sdes:rtp-stream-id\r\na=extmap:6 urn:ietf:params:rtp-hdrext:sdes:repaired-rtp-stream-id\r\na=recvonly\r\na=rtcp-mux\r\na=rtcp-rsize\r\na=rtpmap:96 H264/90000\r\na=rtcp-fb:96 goog-remb\r\na=rtcp-fb:96 transport-cc\r\na=rtcp-fb:96 ccm fir\r\na=rtcp-fb:96 nack\r\na=rtcp-fb:96 nack pli\r\na=fmtp:96 level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=640c1f\r\na=rtpmap:97 rtx/90000\r\na=fmtp:97 apt=96\r\na=rtpmap:98 H264/90000\r\na=rtcp-fb:98 goog-remb\r\na=rtcp-fb:98 transport-cc\r\na=rtcp-fb:98 ccm fir\r\na=rtcp-fb:98 nack\r\na=rtcp-fb:98 nack pli\r\na=fmtp:98 level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=42e01f\r\na=rtpmap:99 rtx/90000\r\na=fmtp:99 apt=98\r\na=rtpmap:100 VP8/90000\r\na=rtcp-fb:100 goog-remb\r\na=rtcp-fb:100 transport-cc\r\na=rtcp-fb:100 ccm fir\r\na=rtcp-fb:100 nack\r\na=rtcp-fb:100 nack pli\r\na=rtpmap:101 rtx/90000\r\na=fmtp:101 apt=100\r\na=rtpmap:127 red/90000\r\na=rtpmap:125 rtx/90000\r\na=fmtp:125 apt=127\r\na=rtpmap:104 ulpfec/90000\r\n”,“sender”:“str_CAM_IgLf_con_V6Jo9zzd73”} request:{“jsonrpc”:“2.0”,“method”:“receiveVideoFrom”,“params”:{“sdpOffer”:“v=0\r\no=- 3915319981802039743 2 IN IP4 127.0.0.1\r\ns=-\r\nt=0 0\r\na=group:BUNDLE 0 1\r\na=msid-semantic: WMS\r\nm=audio 52185 UDP/TLS/RTP/SAVPF 111 103 9 102 0 8 105 13 110 113 126\r\nc=IN IP4 192.168.1.163\r\na=rtcp:9 IN IP4 0.0.0.0\r\na=candidate:776999446 1 udp 2113937151 192.168.1.163 52185 typ host generation 0 network-cost 999\r\na=ice-ufrag:q6QE\r\na=ice-pwd:1ePMDZ9Gs1qG6HtIWY3/z6GA\r\na=ice-options:trickle\r\na=fingerprint:sha-256 ED:79:0F:E0:55:8E:37:15:A7:33:51:5B:20:A7:34:EC:81:0F:4C:DF:D4:EE:0F:05:6D:2D:C0:E9:C6:89:3A:68\r\na=setup:actpass\r\na=mid:0\r\na=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level\r\na=extmap:2 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time\r\na=extmap:3 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01\r\na=extmap:4 urn:ietf:params:rtp-hdrext:sdes:mid\r\na=extmap:5 urn:ietf:params:rtp-hdrext:sdes:rtp-stream-id\r\na=extmap:6 urn:ietf:params:rtp-hdrext:sdes:repaired-rtp-stream-id\r\na=recvonly\r\na=rtcp-mux\r\na=rtpmap:111 opus/48000/2\r\na=rtcp-fb:111 transport-cc\r\na=fmtp:111 minptime=10;useinbandfec=1\r\na=rtpmap:103 ISAC/16000\r\na=rtpmap:9 G722/8000\r\na=rtpmap:102 ILBC/8000\r\na=rtpmap:0 PCMU/8000\r\na=rtpmap:8 PCMA/8000\r\na=rtpmap:105 CN/16000\r\na=rtpmap:13 CN/8000\r\na=rtpmap:110 telephone-event/48000\r\na=rtpmap:113 telephone-event/16000\r\na=rtpmap:126 telephone-event/8000\r\nm=video 59788 UDP/TLS/RTP/SAVPF 96 97 98 99 100 101 127 125 104\r\nc=IN IP4 79.19.249.16\r\na=rtcp:9 IN IP4 0.0.0.0\r\na=candidate:776999446 1 udp 2113937151 192.168.1.163 59788 typ host generation 0 network-cost 999\r\na=candidate:842163049 1 udp 1677729535 79.19.249.16 59788 typ srflx raddr 192.168.1.163 rport 59788 generation 0 network-cost 999\r\na=ice-ufrag:q6QE\r\na=ice-pwd:1ePMDZ9Gs1qG6HtIWY3/z6GA\r\na=ice-options:trickle\r\na=fingerprint:sha-256 ED:79:0F:E0:55:8E:37:15:A7:33:51:5B:20:A7:34:EC:81:0F:4C:DF:D4:EE:0F:05:6D:2D:C0:E9:C6:89:3A:68\r\na=setup:actpass\r\na=mid:1\r\na=extmap:14 urn:ietf:params:rtp-hdrext:toffset\r\na=extmap:2 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time\r\na=extmap:13 urn:3gpp:video-orientation\r\na=extmap:3 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01\r\na=extmap:12 http://www.webrtc.org/experiments/rtp-hdrext/playout-delay\r\na=extmap:11 http://www.webrtc.org/experiments/rtp-hdrext/video-content-type\r\na=extmap:7 http://www.webrtc.org/experiments/rtp-hdrext/video-timing\r\na=extmap:8 http://tools.ietf.org/html/draft-ietf-avtext-framemarking-07\r\na=extmap:9 http://www.webrtc.org/experiments/rtp-hdrext/color-space\r\na=extmap:4 urn:ietf:params:rtp-hdrext:sdes:mid\r\na=extmap:5 urn:ietf:params:rtp-hdrext:sdes:rtp-stream-id\r\na=extmap:6 urn:ietf:params:rtp-hdrext:sdes:repaired-rtp-stream-id\r\na=recvonly\r\na=rtcp-mux\r\na=rtcp-rsize\r\na=rtpmap:96 H264/90000\r\na=rtcp-fb:96 goog-remb\r\na=rtcp-fb:96 transport-cc\r\na=rtcp-fb:96 ccm fir\r\na=rtcp-fb:96 nack\r\na=rtcp-fb:96 nack pli\r\na=fmtp:96 level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=640c1f\r\na=rtpmap:97 rtx/90000\r\na=fmtp:97 apt=96\r\na=rtpmap:98 H264/90000\r\na=rtcp-fb:98 goog-remb\r\na=rtcp-fb:98 transport-cc\r\na=rtcp-fb:98 ccm fir\r\na=rtcp-fb:98 nack\r\na=rtcp-fb:98 nack pli\r\na=fmtp:98 level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=42e01f\r\na=rtpmap:99 rtx/90000\r\na=fmtp:99 apt=98\r\na=rtpmap:100 VP8/90000\r\na=rtcp-fb:100 goog-remb\r\na=rtcp-fb:100 transport-cc\r\na=rtcp-fb:100 ccm fir\r\na=rtcp-fb:100 nack\r\na=rtcp-fb:100 nack pli\r\na=rtpmap:101 rtx/90000\r\na=fmtp:101 apt=100\r\na=rtpmap:127 red/90000\r\na=rtpmap:125 rtx/90000\r\na=fmtp:125 apt=127\r\na=rtpmap:104 ulpfec/90000\r\n”,“sender”:“str_CAM_IgLf_con_V6Jo9zzd73”},“id”:111}
(funzione anonima) (openvidu-browser-2.15.0.js:7855)
dispatchCallback (openvidu-browser-2.15.0.js:8411)
timeout (openvidu-browser-2.15.0.js:8445)

[Error] ERROR:Request has timed out in Request: method:onIceCandidate params:{“endpointName”:“con_V6Jo9zzd73”,“candidate”:“candidate:776999446 1 udp 2113937151 192.168.1.163 52185 typ host generation 0 ufrag q6QE network-cost 999”,“sdpMid”:“0”,“sdpMLineIndex”:0} request:{“jsonrpc”:“2.0”,“method”:“onIceCandidate”,“params”:{“endpointName”:“con_V6Jo9zzd73”,“candidate”:“candidate:776999446 1 udp 2113937151 192.168.1.163 52185 typ host generation 0 ufrag q6QE network-cost 999”,“sdpMid”:“0”,“sdpMLineIndex”:0},“id”:112}
(funzione anonima) (openvidu-browser-2.15.0.js:7855)
dispatchCallback (openvidu-browser-2.15.0.js:8411)
timeout (openvidu-browser-2.15.0.js:8445)

[Error] Error sending ICE candidate: {“request”:"{“jsonrpc”:“2.0”,“method”:“onIceCandidate”,“params”:{“endpointName”:“con_V6Jo9zzd73”,“candidate”:“candidate:776999446 1 udp 2113937151 192.168.1.163 52185 typ host generation 0 ufrag q6QE network-cost 999”,“sdpMid”:“0”,“sdpMLineIndex”:0},“id”:112}",“requestTime”:1601575286066}
(funzione anonima) (openvidu-browser-2.15.0.js:8680)
(funzione anonima) (openvidu-browser-2.15.0.js:3522)
(funzione anonima) (openvidu-browser-2.15.0.js:7869)
dispatchCallback (openvidu-browser-2.15.0.js:8411)
timeout (openvidu-browser-2.15.0.js:8445)

When I see these message in the console, I can’t se video from some of publishers…

Same server with your OpenVidu Call, no problems!

Any tips? Thank you!!!

The client is not receiving an answer from your OpenVidu Server within the allowed timeout. Or your network is unstable, or your server is just too loaded and it cannot anwser in time.
And this has probably nothing to do with the media plane, but with the signaling plane. It is a simple communication issue.