Invalid character in header content ["0"]

export const axiosBase = axios.create({
  baseURL: import.meta.env.VITE_API_URL,
  timeout: 1000,
  withCredentials: true,
})
  loader: async ({ context }) => {
    const userId = context.session.data?.user.id //the useId is 100% there
    const run = createIsomorphicFn()
      .client(async ({ userId }) => {
        const res = await context.queryClient.ensureQueryData(
          queryOptions({
            queryKey: CONFIG_QUERY_KEY,
            queryFn: async () =>
              await axiosBase.get(`/v1/user/${userId}/setting`),
            staleTime: Infinity,
          }),
        )
        return res.data
      })
      .server(async ({ userId }) => {
        const headers = getRequestHeaders()
        const res = await context.queryClient.ensureQueryData(
          queryOptions({
            queryKey: CONFIG_QUERY_KEY,
            queryFn: async () =>
              await axiosBase.get(`/v1/user/${userId}/setting`, {
                headers,
              }),
            staleTime: Infinity,
          }),
        )
        return res.data
      })
    const config = await run({ userId })
    console.log(config)
  },