Usually this is caused by your location services settings, which will need to be enabled for the FanHub app. 

For iOS: https://support.apple.com/en-us/HT207092, 

For Android: https://support.google.com/accounts/answer/6179507?hl=en.

If you are still having issues, there was a known bug in iOS 15.1 that caused issues with location services access. Please ensure you are on the latest version of the OS for your device.  And if you were on iOS 15.1, you will likely need to reinstall the app after you have updated.