NES Health App - Device not authorized to use BluetoothLE - Location Permission missing (code 3)

If you see the following error message when trying to use the NES health App on your phone:

"Device not authorized to use BluetoothLE - Location Permission missing (code 3)"

Please try the following:

1. Go into settings and see if there are any updates to Android and proceed if there are
2. Reinstall the NES Health app
3. Go into settings > apps > NES Health > Permissions, see if any location/Bluetooth permissions are currently 'Not allowed' -- allow these
4. Ensure Bluetooth and location services are turned on (the location is used to find nearby devices i.e. the scanner)
5. Do not connect the phone's Bluetooth to the scanner as this needs to be done directly in the app (if/when possible)
6. Restart the phone after trying the above

 
As a reminder, unlike most Bluetooth devices, the pairing happens inside the app, not in the settings screen but Bluetooth does need to be turned on.