If you are not receiving any Locations, the most probable reason is that the Location services are disabled on the target phone itself.
The locations are sometimes not updated due to the poor GPS signal when the phone is either in the pocket or inside a building (or any other obstruction).
Please perform the following steps on the target phone in order to enable GPS locations:
Open Settings -> Biometrics and Security – find and make sure that Locations are turned on. Go to Improve accuracy -> turn on Wi-Fi scanning.
Other Android Phones
Open Settings -> Locations and security (or 'Location') -> make sure that Locations are turned ON and set to High accuracy.