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What happened?

I am using peerjs version 1.3.1 from an Angular 8 project (https://github.com/davgia/telestroke-web-frontend). I receive the following error when trying to manage streams:

ERROR TypeError: Cannot read properties of undefined (reading 'id')
    at push../node_modules/peerjs/dist/peerjs.min.js.parcelRequire.HCdX.o._addStreamToMediaConnection (peerjs.min.js:54:8692)
    at e.ontrack (peerjs.min.js:54:4039)
    at RTCPeerConnection.i (peerjs.min.js:6:940)
    at ZoneDelegate.invokeTask (zone.js:423:1)
    at Object.onInvokeTask (core.js:26247:1)
    at ZoneDelegate.invokeTask (zone.js:422:1)
    at Zone.runTask (zone.js:195:1)
    at ZoneTask.invoke (zone.js:498:1)
    at invokeTask (zone.js:1693:1)
    at RTCPeerConnection.globalZoneAwareCallback (zone.js:1719:1)

My guess is that this error is thrown after this print, but I don't know exactly where:

https://github.com/davgia/telestroke-web-frontend/blob/73e0c5a13dd8240c0f6a6e652babf14b49a5211f/src/app/services/peer.service.ts#L188

How can we reproduce the issue?

It's a bit difficult to reproduce because there are multiple components in my project, a bunch of microservices, an angular web frontend and an android application.

If necessary I will try to create a new lightweight project.

What do you expected to happen?

My project is 4 years old but I am sure it was working fine. I haven't changed anything so my guess is that some api have been deprecated in webrtc. I had to update my android project too due to some deprecations (mainly addStream and removeStream method have been deprecated in favour of addTrack and removeTrack; but it's Android, I don't know if it's the same for webrtc web).

Environment setup

• OS: linux (Docker Desktop on Windows 11)
• Platform: Angular 8.2
• Browser: Chrome 131.0.6778.205

Is this a regression?

I don't know, it was working 4 years ago. I think something has changed outside peerjs. So no, I don't think so.

Anything else?

My project is 4 years old, I am trying to update it but it's difficult. I cannot give additional support right now.