Adding new stores “REQUEST DENIED”

I have the map working well, however I’m trying to add new stores and each time I do, I get this error message on the WordPress page:

The Google Geocoding API returned REQUEST_DENIED.?

Error message: This IP, site or mobile application is not authorized to use this API key. Request received from IP address 209.237.142.118, with referer: https://maps.googleapis.com/maps/api/geocode/json?address=8403+Louetta+Rd%2CSpring%2CTX%2C77379%2CUnited+States&language=en&region=us&key=AIzaSyAgOvG517gDkyr1pX7vAKlEPDzU2sP3xlQ&libraries=places

Then the status of the store says “pending”. The other store I have listed works just fine, but any new ones do not. Any ideas what the problem is?

The page I need help with: [log in to see the link]