An App ID with Identifier 'com.example.app.extention' is not available. Please enter a different string

Question

I have tried to add extensions to my iOS app, both a today extension and an Apple Watch app. My app has been completed however when submitting my archive I got the error bas

Answer 1

Version 7.3 (7D175)

The Application ID Name should be same as application bundle identifier, if you application bundle identifier is com.abc.xyz than the application ID name for this bundle ID should be XC com abc xyz

A name in any other format won't be seen by Xcode.

If your application is already on app store and you are submitting update than just change the app ID name accourding to above formate and it will work