TypeError: e.clone is not a function

Hi, thanks for your time.

I don't think it's a Vue problem. I suppose it's an Axios configuration.

For those who don't know Axios library, it parses JSON automatically all response/request data. I think there is the problem (not sure) but don't know how to fix it.

The XHR success but in the callback of Dropbox instance, there is a clone function, which fails

TypeError: e.clone is not a function
    at app.js:43042
    at app.js:43042
app.js:34227 XHR finished loading: POST "https://api.dropboxapi.com/oauth2/token?code=2_ILSbfhKnAAAAAAAAAAnF7twcUKrhL6CAKY29ZL-iY&grant_type=authorization_code&redirect_uri=http://localhost/fanny/public/&client_id=myAppID&client_secret=myAppSecret".

Directly from the Dropbox.js:

  getAccessTokenFromCode(redirectUri, code) {
    const clientId = this.getClientId();
    const clientSecret = this.getClientSecret();

    if (!clientId) {
      throw new Error('A client id is required. You can set the client id using .setClientId().');
    }
    if (!clientSecret) {
      throw new Error('A client secret is required. You can set the client id using .setClientSecret().');
    }
    const path = `https://api.dropboxapi.com/oauth2/token?code=${code}&\
grant_type=authorization_code&redirect_uri=${redirectUri}&\
client_id=${clientId}&client_secret=${clientSecret}`;

    const fetchOptions = {
      method: 'POST',
      headers: {
        'Content-Type': 'application/x-www-form-urlencoded',
      },
    };

    return this.fetch(path, fetchOptions)
      .then(res => parseBodyToType(res)) // !!!! It fails here! !!!!
      .then(([res, data]) => {
        // maintaining existing API for error codes not equal to 200 range
        if (!res.ok) {
          // eslint-disable-next-line no-throw-literal
          throw {
            error: data,
            response: res,
            status: res.status,
          };
        }
        return data.access_token;
      });
  }

parseBodyToType 

function parseBodyToType(res) {
  const clone = res.clone();
  return new Promise((resolve) => {
    res.json()
      .then(data => resolve(data))
      .catch(() => clone.text().then(data => resolve(data)));
  }).then(data => [res, data]);
}