The problem is that the key has been added but not saved.
At System > Configuration > Amasty Extensions > One Step Checkout , Google Autocomplete tab please re-add your API key.
Then, 'Save' and flush the cache.
Knowing customer's location is necessary to propose addresses nearest to them for auto suggesting.
For better privacy sake, however, a customer may decide not to share his location information with API - auto suggest results can be less precise in this case.
This behavior is being controlled from web browser's side.
Please check content of this page.
If you see only 'Add billing account' prompt here - it means that your Google account doesn't have Billing enabled, thus API calls limit for it is too short.
If you have more than one project at Google - please make sure that your new Billing account is linked with a proper project. It can be checked here.
After successful Billing creation & linking up to 15 minutes should pass - API call limit will become more adequate afterwards.
Most frequent cause is a misprint in API key.
At System > Configuration > Amasty Extensions > One Step Checkout , Google Autocomplete tab please re-add the API key.
Then, 'Save' and flush cache.
This one is completely harmless, no additional actions required, it shouldn't affect anything.
To allow Places API, please choose either
To solve it, please choose either