The stream event is not working in PeerJS - express

Question

The application is a Zoom-like program where users are connected P2P using PeerJS calling feature.
This is the PeerJS object set up:
var peer = new Peer(undefined, {
config: {
'iceServers': [
{
url: 'stun:relay.metered.ca:80'
},
{
url: 'turn:relay.metered.ca:80',
username: '*********',
credential: '**********',
},
{
url: 'turn:relay.metered.ca:443',
username: '*********',
credential: '*********'
}
]},
host: '/',
port: '3001'
})
Playing the current user's stream, and listening for other peers' calls:
const myVideo = document.createElement('video')
myVideo.muted = true
const peers = {}
navigator.mediaDevices.getUserMedia({
video: true,
audio: true
}).then(stream => {
addVideoStream(myVideo, stream)
// listen for external calls on peer server
peer.on('call', call => {
call.answer(stream)
const video = document.createElement('video')
call.on('stream', userVideoStream => {
addVideoStream(video, userVideoStream)
})
})
socket.on('user-connected', userId => {
const call = peer.call(userId, stream)
const video = document.createElement('video')
call.on('stream', function(videoStream) {
addVideoStream(video, videoStream)
})
call.on('close', () => {
video.remove()
})
peers[userId] = call
})
})
peer.on('open', id => {
socket.emit('join-room', ROOM_ID, id)
})
function addVideoStream(video, stream) {
video.srcObject = stream
// once the video's ready play it
video.addEventListener('loadedmetadata', () => {
video.play()
})
videoGrid.append(video)
}
The server file:
const express = require('express')
const app = express()
const server = require('http').Server(app)
const io = require('socket.io')(server)
const { v4: uuidV4 } = require('uuid')
app.set('view engine', 'ejs')
app.use(express.static('public'))
app.get('/', (req, res) => {
res.redirect(`/${uuidV4()}`)
})
app.get('/:room', (req, res) => {
res.render('room', { roomId: req.params.room })
})
io.on('connection', socket => {
socket.on('join-room', (roomId, userId) => {
socket.join(roomId)
socket.to(roomId).emit('user-connected', userId)
socket.on('disconnect', () => {
socket.to(roomId).emit('user-disconnected', userId)
})
})
})
server.listen(3000)
I connect the app successfully, and I can make calls when I open the the same room's URL in another browser window (Chrome), but the call.on('stream') does not execute. I tried to see if there is an error using peer.on(error), and console.log() in the stream event's callback function, but there were no errors. I don't know what I'm missing here! Any help would be appreciated. Thank you.