The export default was not found in module [project]/node_modules/swr/dist/index/react-server.mjs [app-rsc] (ecmascript) <exports>.
Did you mean to import unstable_serialize?
All exports of the module are statically known (It doesn't have dynamic exports). So it's known statically that the requested export doesn't exist.

import useSWR from "swr";
  const { data, error, isLoading } = useSWR("/api", fetcher);

  if (error) return <div>failed to load</div>;
  if (isLoading) return <div>loading...</div>;