Google Maps Geocode keys were working properly before, and the problem only appeared yesterday, I am using Google Maps geocode API to get Addresses auto complete suggestions.
NOTE: In case you are using this API for an Android or iOS App, you will have to use the other Libraries “Google Places API for Android” or “Google Places API for iOS”.
Finally on the Library you, will find an “Enable” button click it, in case it says “Disable” that means the library is already active:
if none of the solutions suggested above didn’t work for you (though that’s awkward) you have one last chance of checking your QPM or QPS (Quota Per Month or Quota Per Second) as that can cause the problem as well, check your Google API dashboard if you reached your quota limit.
If you did reach the quota limit wait for it to reset, or add pauses to your code.