On my iPhone 6S (iOS 9.1), in the Find my Friends app, the 'Add' button is greyed out, and the 'Ask to follow' button is also greyed out.
In my iPhone iCloud settings, the whole section under 'Share my location' is also greyed out, even though it is switched on, and says share from this device.
I've searched support articles and support communities. Nothing addresses this issue.
How can I fix this?


iPhone 6s, iOS 9.0.2, 64GB, Silver