CloudKit key and encryption errors on iOS 15 beta 1 on Simulator?

I am having trouble with my existing CloudKit app on iOS 15 beta simulator. Tried with Xcode 13 beta 1 on both Big Sur and Monterey.

When I try to set up CloudKit record zones, I get the error:

<CKError 0x600000ad34e0: "Partial Failure" (2/1011); "Failed to modify some record zones"; partial errors: {
	Zone1:__defaultOwner__ = <CKError 0x600000aab990: "Internal Error" (1/5000); "Failed to sync user keys">
	Zone2:__defaultOwner__ = <CKError 0x600000aac180: "Internal Error" (1/5000); "Failed to sync user keys">
}>

And when I try to retrieve some records:

<CKError 0x600000aa6670: "Partial Failure" (2/1011); "Failed to fetch some query results"; partial errors: {

	17E15463-28D9-4A8F-9C00-13864C0B1922:(Zone1:__defaultOwner__) = <CKError 0x600000a74120: "Internal Error" (1/5001); "Record <CKRecordID: 0x7fea11997820; recordName=17E15463-28D9-4A8F-9C00-13864C0B1922, zoneID=Zone1:__defaultOwner__> has items that require encryption but no zone protection data was found: <CKError 0x7fea105c6b40: "Internal Error" (5000/com.apple.protectedcloudstorage:97); "Failed to sync user keys">">

	4CADA078-7040-4633-9321-C1FF6C5BF80C:(Zone1:__defaultOwner__) = <CKError 0x600000a6c570: "Internal Error" (1/5001); "Record <CKRecordID: 0x7fea1198d250; recordName=4CADA078-7040-4633-9321-C1FF6C5BF80C, zoneID=Zone1:__defaultOwner__> has items that require encryption but no zone protection data was found: <CKError 0x7fea105c6b40: "Internal Error" (5000/com.apple.protectedcloudstorage:97); "Failed to sync user keys">">

	E1558266-C19A-4A46-BC1A-B11303DA87FC:(Zone1:__defaultOwner__) = <CKError 0x600000a60210: "Internal Error" (1/5001); "Record <CKRecordID: 0x7fea132dfb80; recordName=E1558266-C19A-4A46-BC1A-B11303DA87FC, zoneID=Zone1:__defaultOwner__> has items that require encryption but no zone protection data was found: <CKError 0x7fea13263e60: "Internal Error" (5000/com.apple.protectedcloudstorage:97); "Failed to sync user keys">">

}>

<CKError 0x600000af8d50: "Partial Failure" (2/1011); "Failed to fetch some query results"; partial errors: {

	BE1508B0-20C1-483A-B536-FFA1949E758A:(Zone1:_9b181defada871111c80080a15254790) = <CKError 0x600000aec7b0: "Internal Error" (1/5001); "Record <CKRecordID: 0x7fea1198cf00; recordName=BE1508B0-20C1-483A-B536-FFA1949E758A, zoneID=Zone1:_9b181defada871111c80080a15254790> has items that require encryption but no share protection data was found: <CKError 0x7fea105980b0: "Internal Error" (5004/5004); "Couldn't create share PCS data for share <CKRecordID: 0x7fea119910d0; recordName=Share-7347C086-8BA5-47C6-96AD-1DD12B1AAC8D, zoneID=Zone1:_9b181defada871111c80080a15254790>">">

	F1D604B6-A4BC-4F2E-A23E-5B50A2D7C82D:(Zone1:_9b181defada871111c80080a15254790) = <CKError 0x600000a740f0: "Internal Error" (1/5001); "Record <CKRecordID: 0x7fea11985170; recordName=F1D604B6-A4BC-4F2E-A23E-5B50A2D7C82D, zoneID=Zone1:_9b181defada871111c80080a15254790> has items that require encryption but no share protection data was found: <CKError 0x7fea107bfb10: "Internal Error" (5004/5004); "Couldn't create share PCS data for share <CKRecordID: 0x7fea10416370; recordName=Share-C990C533-D709-4B7D-B916-418336386366, zoneID=Zone1:_9b181defada871111c80080a15254790>">">

}>

I wonder if anyone else has experienced the same? Or if I can do something on my end to fix it?

I’ve filed FB9144546 about this.