WHEPClient.subscribe never resolves

[Burtonium]

Stream is simply black. Sometimes it comes online seemlingly at random, but most times it doesnt. We've identified the cause as the subscribe function never resolving when the server 4** errors.

This error might be a clue as I see it when the promises dont resolve: [red5pro-sdk] error: (WhipWhepSignalingHelper) Failed to fetch,
TypeError: Cannot read properties of undefined (reading 'getStats') on chrome and TypeError: this.getPeerConnection() is undefined on Firefox.