PTInstantiationError.Code.unknown An instantiation error that indicates an unknown error. Declarationcase unknown See AlsoError codesPTInstantiationError.Code.invalidPlatformPTInstantiationError.Code.missingBackgroundModePTInstantiationError.Code.missingPushServerEnvironmentPTInstantiationError.Code.missingEntitlementPTInstantiationError.Code.instantiationAlreadyInProgress