Same here, iPadOS 15 beta Terminating app due to uncaught exception 'CKException', reason: 'Terminating app due to uncaught exception 'CKException', reason: 'CKDatabaseOperations must be submitted to a CKDatabase'

To debug, or see print info: (This works for me) On the top left of Xcode-> Click project name, you can see a list, select widget name, run it Click widget name, you can see a list, select project name, run it  Xcode: Version 12.3, iPad: iPadOS 14.3