Getting same error, though not mentioning RealmSwift specifically (app does use it): The app references non-public selectors in Payload/IgCares.app/IgCares: authenticationDidCompleteWithError: Have not updated anything about app except making some storyboard/UI updates. Last build was accepted and approved by apple.

Suddenly having same/similar issue with new builds, today, Sept 22 2022: The app references non-public selectors in authenticationDidCompleteWithError: App has previously uploaded many versions with no issues, no new changes even remotely connected to any authentication, and in fact my app doesn't even use any such method so must be in a third-party library (RealmCocoa or Google Firebase is my guess).