You are probably getting a Cross Origin (CORS) error (here is an earlier answer ). Can you check the console in Chrome Dev Tools to see if you are getting a No ‘Access-Control-Allow-Origin’ header error.
If that is not the problem then check the result of the query on the Chrome Dev Tools Network tab (here’s a HOWTO). The target field for each series should contain a value that matches the key field in your location data:
