Did you ever figure this out? I'm having the same problem.

Well this is interesting. I just created another Apple ID account, and signed in with that, and I don't get these errors anymore. So I guess it's something about my Apple ID. But I don't have the slightest idea how to fix that. Edit: one thing I notice about the Apple ID that doesn't work: when I sign in on the simulator, the "Sign Out" button in iCloud is disabled. I don't know if that's relevant.

I've been fighting this since last month. It first showed up in Xcode 14. If I ran my apps in Xcode 13, CloudKit worked in the simulator. Then at some point, I had to wipe some of the simulators. Once I did that, I started getting these errors in Xcode 13 as well so now my only option is to run on device.

I don't know what happened, but I'm now getting the same errors with Xcode 13 so CloudKit won't work in any simulator. I opened a report and got a request to include a simctl diagnose, which I did, but haven't heard anything back since.

I pulled down Xcode 13, and verified CloudKit syncing works correctly in the simulator, so this appears to be something specific to Xcode 14.

Answering myself, but I was able to get around this by manual signing. I don't know why the automatic signing process is failing, but there it is.

Thanks. Feedback id is 8016440

Answering my own question! Turns out ZoneId is the answer, just not the way I thought. Had to pass in com.apple.coredata.cloudkit.zone to the options, like this: 	ZONE_ID = 'com.apple.coredata.cloudkit.zone'; 		const response = await this.cloudKitService.db.saveRecords([task], 			{ zoneID: this.ZONE_ID }); And now it works!

Egad!! That was 100% it. I don't know what I had done, but yeah several things were mapped to backspace. Very strange. I created a new Default keymap binding and all is well now. Thanks!