React Axios Error in IE 11, but Not Chrome

The following works in Chrome, but gives Network Error in IE 11. Same with using Fetch instead of Axios. What am I missing?

async componentDidMount() {
    var auth = "Basic " + btoa(process.env.REACT_APP_CREDENTIAL);
    var state = this;

    Axios.get(
      process.env.REACT_APP_URL,
      {
        headers: {
          Accept: "application/json",
          "Content-Type": "application/json",
          Authorization: auth,
        },
        withCredentials: true,
      }
    )
      .then(function (response) {
        console.log(response.status);
        state.setState({ data: response.data.value });
      })
      .catch(function (error) {
        console.log(error);
      });
  }