What I think is happening is the server for ingestion doesn't seem to be running, the WHIP service starts up, then the WHEP makes a call on line 34 which outputs an error on line 58

let response = await postSDPOffer(endpoint, ofr.sdp);

the SDP information response isn't ready so it outputs errors & freezes. After connection negotiation ended, you would assume the playback starts, but for me it hangs & doesn't load video. Funnily enough, if the dashboard says 'disconnected' I am less likely to see failing playback. Right now the server is connected and no video output shows.