If you are using an Android device please check your location setting and select GPS, Wi-Fi, and Mobile networks.  If it's GPS only than it will not work.  Also to test this I would recommend doing this at home and  log out from the App and log back in then drive about a couple blocks away (approximate 150 ft) and drive back toward your house.  If you are still having issues please let us know.  

Android location settings

 

Privacy and safety -> Location -> Location method -> GPS, Wi-Fi, and Mobile networks