A similar issue occurred with the latest version of Xcode, Version 16.0 (16A242). My feedback: FB15112270

I received an error message stating that some of the screenshots I uploaded contained an alpha channel. I deleted these and re-uploaded images without an alpha channel, and was then able to submit my entry for review. In addition, after submitting the app for review, the Apple Watch and iMessage settings options will no longer appear on the app editing page, and the Apple Watch and iMessage tabs have been removed from the screenshot editing page. I hope this can be of some use to someone.

Thank you for telling me the solution.

I'm having the same issue. I tried with a binary built with a regenerated provisioning profile, same result. I am sending feedback. FB13071874

I have confirmed that this issue has been resolved. Thank you.

The status of the submitted feedback (FB11471550) is now "Resolution: Investigation completed - Unable to diagnose with current information". The undiagnosable situation with current information suggests that it will take some time to resolve. On the day iOS 16 was released, I was preparing to publish an app that incorporates WeatherKit, but I'm sorry I couldn't.

Even with this warning message, I was able to upload the binary to App Store Connect. And it passed the review by Apple and was able to be distributed on the App Store. The delivered app is working fine. Since the message is "Distribution completed with warnings" instead of "Distribution failed with errors", it seems that the upload to App Store Connect was successful.

Submitted to Feedback Assistant at FB11471550. App review for iOS16 has started, but unless this problem is resolved, the review will be rejected. We hope for an early resolution.

I'm not sure if Apple's review uses the SANDBOX environment to test in-app purchases. If Apple is reviewing using the SANDBOX environment, I think it could be rejected if the binary is submitted for review in a situation where this is happening in the SANDBOX environment. If Apple's review was rejected in a situation where this phenomenon did not occur in the SANDBOX environment, I think there is another cause.

The phenomenon I encountered seemed to be due to a temporary failure in SANBOX. If it's the same cause, it may go away in a few days, but it's a good idea to send a feedback to Apple.