Geo code api empty hits

Hi Team,
we are using Graphhopper geocode API to fetch Latitude and Longitude from address.
But we are receiving empty hits. Please let us know if we have any work around for this.

Sample request : graphhopper/api/1/geocode?q=857+Stonebridge+Court%2CTracy%2CUS%2C95376%2C&provider=nominatim&locale=en&reverse=false

Response: {“hits”:,“locale”:“en”}