Error: An API access token is required to use Mapbox.js. See

[cristhianCMH]

Hi, I'm using ionic framework for a view, and returns me that error on the console, Greetings error completed
Error: An API access token is required to use Mapbox.js. See https://www.mapbox.com/mapbox.js/api/v2.1.9/api-access-tokens/
at Object.module.exports (https://api.tiles.mapbox.com/mapbox.js/v2.1.9/mapbox.js:60:184)
at Function.module.exports.tileJSON (https://api.tiles.mapbox.com/mapbox.js/v2.1.9/mapbox.js:60:798)
at module.exports._loadTileJSON (https://api.tiles.mapbox.com/mapbox.js/v2.1.9/mapbox.js:42:159)
at L.Map.extend.initialize (https://api.tiles.mapbox.com/mapbox.js/v2.1.9/mapbox.js:44:2552)
at new o.Class.extend.e (https://api.tiles.mapbox.com/mapbox.js/v2.1.9/mapbox.js:4:2539)
at Object.module.exports.map (https://api.tiles.mapbox.com/mapbox.js/v2.1.9/mapbox.js:44:4962)
at link (http://localhost:8100/lib/angular-mapbox/dist/angular-mapbox.js:156:30)
at invokeLinkFn (http://localhost:8100/lib/ionic/js/ionic.bundle.js:16918:9)
at nodeLinkFn (http://localhost:8100/lib/ionic/js/ionic.bundle.js:16428:11)
at compositeLinkFn (http://localhost:8100/lib/ionic/js/ionic.bundle.js:15777:13)

[cristhianCMH]

I'm sorry, it was the version of the css and js MapBox