I am trying to get SSE events working for the first time, and am encountering an error around content types I could use help with:

No matching content-type available {:supported-content-types #{application/json application/transit+msgpack application/transit+json application/edn}, :available-content-types (multipart/form-data), :header Accept}

{:body (stream-events response event-chan) ;; fixed one bug where those were reversed, did not help.
        :headers {"Content-Type" "text/event-stream"}}

(defn stream-events [source sink]
  (async/go
    (loop []
      (let [event (async/<! source)]
        (when (not= :done event)
          (async/>! sink event)
          (recur))))))