After updating to Xcode 15.3 and Sonoma, I started getting an error when packaging my app:
Provisioning profile failed qualification Profile doesn't include the com.apple.developer.mail-client entitlement.
There is no indication in the documentation that this has anything to do with the provisioning profile, and there is no capacility that needs to be added.
I was given the "com.apple.developer.mail-client" entitlement from Apple over a year ago as documented in: https://developer.apple.com/documentation/bundleresources/entitlements/com_apple_developer_mail-client, and it worked fine until now.