Problem Solved

 As the tittle implied, I've got an error message that it says "Bad state: No element The relevant error-causing widget was CustomP...

Here's an example. double width; width = width + 19.0; We can make it short like so                            is equal to   width += 30...

Save a reference to the ancestor by calling dependOnInheritedWidgetOfExactType() in the widget's didChangeDependencies() method. Found t...

 Here we declare a new class in the main.dart ///  HttpOverrides.global = HttpOverridesSkipCertificate(); class MyHttpOverrides extends Http...

Note this is for Windows another OS should be work too just change  and adjust folder and the \ to / for Linux and Mac  For debug mode do th...