Unable to enable development on iOS 10.1.1
Maybe you forgot to register your device with your develop account? I got that error code (0x8000076) when I forgot to register it. To double check:


Find the identifier of your iPhone


In Xcode open the devices window (Window - Devices)
Select your phone and find its identifier

Login to your developer account (https://developer.apple.com/account)
Navigate to your devices (https://developer.apple.com/account/ios/device/)
Find the identifier in the list of devices.
Check if the names are identical


If it is missing, create a new entry.