Google has made an update which no longer allows Mere to supply the API key for the maps widget directly. Instead, you'll need to set up your own, with billing so that Google can charge you if the usage exceeds a certain amount (don't worry, 99% of our churches don't pay anything -- the free tier is very very generous, and should well accommodate you!).
Anyhow, you can generate that API key by following this tutorial:
https://studiosimpati.co/setup-configure-google-maps-api-key/
Once that's done, please contact us at [email protected] with the API key and we'll get it set up for you.