error mapbox emberjs module

I there is a problem in Emberjs with 'mapbox', this error: Could not find module mapbox imported from grao-online-front/instance-initializers/mapbox

import ENV from '../config/environment';
import L from 'mapbox';

export function initialize() {
  L.mapbox.accessToken = ENV.mapbox.accessToken;
}

export default {
  name: 'mapbox',
  initialize
};