The method 'findRootAncestorStateOfType' was called on null. Receiver: null Tried calling: findRootAncestorStateOfType<NavigatorState>()

[fabioselau077]

onTap in GestureDetector return this error:
The method 'findRootAncestorStateOfType' was called on null.
Receiver: null
Tried calling: findRootAncestorStateOfType()

How to resolve? I'm using example code YYAlertDialogWithGravity.

[fabioselau077]

I forget "YYDialog.init(context);".
Thanks for package, amazing work.