Give the title of the calling methods, is this possibly an objective-c only problem? Does anyone have a working ASCredentialProviderViewController?

Submitted. FB12084416. See comments added above.

Agree. It did for me.

Actually after disabling and then later re-enabling Source Control in XCode settings, the problem went away. So perhaps some internal Xcode state is to blame...

Upgraded to Ventura and Xcode 14.2. Same problem.

Ditto. Code that works fine on iOS 12, 13, 14 and 15 (devices) fails on iOS 15 simulator. SecItemAdd returning errSecAuthFailed. kSecAttrAccessControl object has kSecAccessControlBiometryCurrentSet|kSecAttrAccessibleWhenPasscodeSetThisDeviceOnly