iphonic

Scenario: your code (and all your pre-compiled binaries) are compatible with XCode 8.3.3, but your phone runs iOS 11.0, 
which would requires XCode 9.0 to be able to run your app.

How to fix it:

Install the newer XCode (e.g. 9.0), required for that version
Link device support for the new iOS version from the new XCode (8.3.3) to the old XCode (9.0):
assuming the next Xcode is in /Applications/Xcode_9.app and the old Xcode is in /Applications/Xcode

ln -s /Applications/Xcode_9.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport/11.0