Using the geotrace (Draw a Line function). When an address is put into the search box nothing is returned. In the Developer Console (F12) section you can see the call going to google maps and is getting rejected.
It seems you need an API key for authentication before it can process your request. can you add the key at the end of your URL “&key=YOUR_API_KEY”.
Another possible reason that you have exceeded the usage limits for the Google Maps API.
If it is at all possible with this fix - can you add a field to put in your own Google API key into the widget? This would allow the end user to provide their own Google API key for additional customization. Plus cost savings to not use yours.
It would make sense to limit your API key to X amount of retrievals per second and to add a disclaimer saying so. Google API hits are not cheap.