If you're using Google Maps on #CalyxOS and it stopped working recently, that's because newer versions of Maps need a newer #microG version to work. As CalyxOS paused development, the workaround for now is to downgrade Maps to version 1068495399 (March release).
1. Uninstall Maps app
2. Open Aurora store, find "Google Maps" app
3. Click "Select version"
4. Put "1068495399"
5. Don't update Maps before you upgraded CalyxOS to the upcoming release