I am notifying Armchair of a significant event from a callback of a async request as follows

func onTransactionCompleted(status: TransactionStatus) {
  if (status == .success) {
      DispatchQueue.main.async {
        Armchair.userDidSignificantEvent(true)
      }
  }
}

but Alertcontroller is not shown and debugger shows

warning: Attempt to present UIAlertController on UINavigationController whose view is not in the window hierarchy!