Warning: Attempt to present * on * which is already presenting (null)
I have found out a solution.
I have add the following code in HomeViewController.viewDidLoad and that works !
definesPresentationContext = true
In my case, I found my code to present the new viewController (a UIAlertController) was being called twice.
Check this before messing about with definesPresentationContext.
In my case, I tried too early to show the new UIViewController before closing the previous one. The problem was solved through a call with a slight delay:
DispatchQueue.main.asyncAfter(deadline: .now() + 0.3) { self.callMethod()}