I’m seeing the same error on both Xcode 15.0 and Xcode 15.1 Beta. For me, I think this issue stemmed from NSPersistentCloudKitContainerOptions. I’m using NSPersistentCloudKitContainer in my app. If I set NSPersistentStoreDescription.cloudKitContainerOptions to nil, this error would go away. Of course my app can’t sync via CloudKit if I do that. Another issue may or may not related to this warning: ever since I built my app on Xcode 15, I’ve seen excessive disk read on the sqlite file of CoreData on launch. The amount of disk read can be as much as twice the size of the sql file, basically making the app impossible to use for some users with large data set. But if cloudKitContainerOptions is nil, this excessive disk read would disappear. Last issue may or may not related to this warning: the size of CoreData sqlite file in my app is 130 MB. But in iPhone Settings → [User Name] → iCloud → Manage Account Storage, it says my app takes up a whopping 2.7 GB of space. No matter how the calculation is done, it can’t be right. The app takes 300 MB of space as shown in iPhone Settings → General → iPhone Storage. So I wonder what This could lead to wrong data usage accounting. could be saying.

Hi there. Did you find any solutions? I did notice that there is a "(iOS)" after Notification Service in this link: App Extension Programming Guide - https://developer.apple.com/library/archive/documentation/General/Conceptual/ExtensibilityPG/index.html#//apple_ref/doc/uid/TP40014214-CH20-SW1. So does that mean Notification Service is not supported on macOS after all?