Can't get WebRTC to work in different networks - vue.js

Question

I am trying to transfer a video streaming from one browser to another with WebRTC and socket.io. It works just fine in the same network. No image is getting through across different ones.
I use socket-io as a signal server. I register two browsers in a "room" and then start sending signals.
The code which is executed in the browser from which the streaming is sent:
function joinRoom(room) {
if (room === '') {
alert('Please type a room ID')
} else {
data = { room: room};
socket.emit('join', data);
}
}
// SOCKET EVENT CALLBACKS =====================================================
socket.on('room_created', async () => {
console.log('Socket event callback: room_created')
await setLocalStream(mediaConstraints)
socket.emit('startc', {room: roomId, clientip: clientip})
isRoomCreator = true
})
socket.on('full_room', () => {
console.log('Socket event callback: full_room')
alert('The room is full, please try another one')
})
socket.on('startc', async () => {
console.log('Socket event callback: start_call')
if (isRoomCreator) {
rtcPeerConnection = new RTCPeerConnection(iceServers)
addLocalTracks(rtcPeerConnection)
rtcPeerConnection.ontrack = setRemoteStream
rtcPeerConnection.onicecandidate = sendIceCandidate
await createOffer(rtcPeerConnection)
}
})
socket.on('offer', async (event) => {
console.log('Socket event callback: offer')
if (!isRoomCreator) {
rtcPeerConnection = new RTCPeerConnection(iceServers)
addLocalTracks(rtcPeerConnection)
rtcPeerConnection.ontrack = setRemoteStream
rtcPeerConnection.onicecandidate = sendIceCandidate
rtcPeerConnection.setRemoteDescription(new RTCSessionDescription(event))
await createAnswer(rtcPeerConnection)
}
})
socket.on('answer', (event) => {
console.log('answer');
console.log('Socket event callback: webrtc_answer')
rtcPeerConnection.setRemoteDescription(new RTCSessionDescription(event))
})
socket.on('webrtc_ice_candidate', (event) => {
console.log('Socket event callback: webrtc_ice_candidate')
// ICE candidate configuration.
var candidate = new RTCIceCandidate({
sdpMLineIndex: event.label,
candidate: event.candidate,
})
rtcPeerConnection.addIceCandidate(candidate)
})
The code that accepts the streamed media (vuejs):
socket.on("offer", (data) => {
this.$emit("closeWaitingToConnect");
this.createAnswer(data);
});
joinMeToRoom() {
console.log("joinToRoom: ", this.room);
this.$socket.emit("join", this.room);
}, //joinMeToRoom ()
createAnswer: function(event) {
var roomId = this.room.room;
let sessionDescription
this.peer.ontrack = this.setRemoteStream
this.peer.onicecandidate = this.sendIceCandidate
this.peer.setRemoteDescription(new RTCSessionDescription(event))
try {
sessionDescription = this.peer.createAnswer().then((answer) => {
var anwer =
console.log('sessionDescription');
console.log(answer);
this.$socket.emit('answer', {
type: 'webrtc_answer',
sdp: answer,
sessionDescription: JSON.stringify(answer),
roomId,
})
return this.peer.setLocalDescription(answer)
});
} catch (error) {
console.error('cae: '+error)
}
},
getScreenPosition() {
const right = this.$refs.screen.getBoundingClientRect().right;
const bottom = this.$refs.screen.getBoundingClientRect().bottom;
return { bottom: bottom, right: right };
},
setRemoteStream(event) {
console.log('event setRemoteStream');
console.log(event);
var stream_screen = document.querySelector("video");
stream_screen.srcObject = event.streams[0];
stream_screen.play();
var remoteStream = event.stream
},
I have setup my own TURN server and tried paid versions. Still can't get the stream across different networks.
What am I missing?