labres on "SiteOrigin Google Maps Widget API"

I cannot get the Google Map to display using the SiteOrigin Google Maps Widget. I obtained a Google Maps Javascripts API for a Browser type but always get this message in the browser window when entering the Map address from the Map icon: "The Google Maps API server rejected your request. This API project is not authorized to use this API. Please ensure that this API is activated in the APIs Console: https://console.developers.google.com/apis/library?project=_ Please ensure this API is activated in the Google Developers Console: https://console.developers.google.com/apis/api/static_maps_backend?project=_". I have tried several new API keys but always get the same message.
Thanks for any advice on this issue.
Larry Bresina

Hi labres,

Alex from SiteOrigin here. :)

That error basically means that the domain that the API key is being used on hasn't been authorised to use it. Please refer to this help doc (​https://developers.google.com/maps/documentation/javascript/get-api-key#registering-authorized-urls) for more information and steps to authorise your domain to use the API key.

Alex, I visited the help doc link on registering authorized urls. That reference seems to be for Authentication for Google Maps APIs Premium Plan customers and is for Client IDs, not API keys. So do have to be on the Premium Plan to use the SiteOrigin Google Maps Widget? Shouldn't I be able to use the Standard API? The key I have through the Standard API allows designating http referrers (web sites), but that is optional.
Any further help would be much appreciated.
Larry Bresina