Navigator.pop(context); doesn't work!

[Mu7ammadRasul]

i tried the default CupertinoAlertDialog and was just working fine but when i switched to material_dialogs package then neither Navigator.pop(context) nor Navigator.of(context).pop did work, it pops into the previous page instead of vanishing the dialog!

edit1:
The relevant error-causing widget was: MaterialApp MaterialApp:file:///C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_no_internet_wi dget-0.0.9+17/lib/src/flutter_no_internet_widget.dart:71:12