I'm using axios with this request code in reactJS

import axios from 'axios';

var config = {
  method: 'get',
  url: 'https://pro-api.coinmarketcap.com/v1/cryptocurrency/listings/latest',
  // i have pro API KEY so i can't put it here :-)
  headers: { 
    'X-CMC_PRO_API_KEY': 'MYAPIKEY'
  }
};

axios(config)
.then(function (response) {
  console.log(JSON.stringify(response.data));
})
.catch(function (error) {
  console.log(error);
});

but I'll get ERR_NETWORK error
where is my problem?