upstream_refused

The upstream refused the WebSocket.

HTTP 400, 401, 403, 404, 409, 429, 502.

Likely cause: The upstream answered the upgrade with an error status.

What to do: Check the path and the subscription.

Retry: No. The same request gets the same answer; change something first.

Listed under Streaming in Errors. Send the error’s requestId to support and we can find the request.