simple-player demo not working against cloudflare/moq-rs

[gdavila]

When testing the simple-player demo against cloudflare/moq-rs, i. e., https://interop-relay.cloudflare.mediaoverquic.com/ or the the local relay, I can't get playback started.

Environment

• moq-js: main (draft-ietf-moq-transport-14)
• Relay tested: https://interop-relay.cloudflare.mediaoverquic.com (cloudflare/moq-rs main, also targeting draft-14)
• Publisher: moq-pub from cloudflare/moq-rs
• Browser: Chrome (latest)

Steps to reproduce

1. Start a publisher against a draft-14 relay (e.g. the Cloudflare interop relay or a local moq-relay-ietf):

NAME=bbb URL=https://interop-relay.cloudflare.mediaoverquic.com:443 ./dev/pub --bind 0.0.0.0:0

2. Open the simple-player demo, point it at the same relay + namespace.
3. Playback don't start and throws the error attached in the image

Am I missing something? Not sure if this is a moq-js or a moq-rs pub/relay issue tbh.