Network location provider at 'https://www.googleapis.com/' : Returned error code 403 in Webapp
This happened to me too. I had to enable location services on my Mac.
After looking for an answer, I think there is something wrong with Google
I tried it with developers.google site
Safari: worked
Google Chrome: failed
It is indeed a chrome issue, to get around it you have to check your developer dashboard and make sure that your API key has no warnings.
Also, you need to make sure that the proper usage restrictions are in place for the development phase:
This key is unrestricted. To prevent unauthorized use and quota theft, restrict your key.Key restriction lets you specify which web sites, IP addresses, or apps can use this key.
More information can be found here.