NBS Chorus uses Openstreetmap.org (which is an open, community-driven mapping service) to query the project location and presents this in a rendered map using Google Maps.
If you enter a location you know to be valid and NBS Chorus returns ‘No results’, this may be because the location you are looking for is not known to Openstreetmap.org.
In this situation, enter a location for the general area of the project and use the map to drop the pin in a more accurate location. This will update the latitude and longitude coordinates.