The server (api.angel.co) is not responding with Access-Control headers which results in this error.
When sending XHR requests to domains different from the origin domain web browsers are checking if the service allows this. In your case api.angel.co would need to include the header Access-Control-Allow-Origin: *
as part of the response (which it does not).
Assuming you cannot change api.angel.co, an alternative would be to build a server-side proxy (e.g. in node.js) which allows Cross-Origin Resource Sharing.
Check out this great article about Cross-Origin Resource Sharing (CORS).