I have the same problem. This looks like a bug in watchOS. Is there a radar for it?

I tried to set it on iOS 17.5 and also used Legacy Previews Execution, no luck The crash seems to be somewhat different, since once I set it on Legacy Previews Execution it starts giving me an error on 3rd party dependencies: Missing required modules: 'FirebaseCore', 'FirebaseCrashlytics' The error I get when PreviewShell crashes is attached to this comment, maybe someone finds it helpful. Thanks! preview-shell-crash.log