Xcode 12.2: same for Simulator iOS 14.2, but works in Simulators with iOS 13.5 or 13.7.
If anyone getting trouble with iOS 13 like me, here is checklist. In any case: "Sign in with Apple" capability must be enabled in Xcode
"Sign in with Apple" capability must be enabled for the bundle id (from developer.apple.com/account/resources/identifiers/list - https://developer.apple.com/account/resources/identifiers/list)
Provisioning profile must be re-downloaded and set for signing, if using manual code signing
pa7el
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