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

I found the solution from Apple developer forums.

Apple has just updated their Dev Center CGU. It seems that the app extension bundleId is stricter.

if your app bundleId format is : com.my.app

your app extension bundleId now have to be : com.my.app.XXX

Creating new appID and provisioning profile fix the issue.

Check this link https://forums.developer.apple.com/thread/15712