I am trying to get this:First image, but instead all I get is this: What I get after running code

I am trying to get this:First image, but instead all I get is this: What I get after running code

So far, I’ve followed everything explained in this video -> https://www.youtube.com/watch?v=rqo1w0d5i7w. After that, I created another widget in Xcode and added it to a new group. Unfortunately, that didn’t work.

I don’t know what I did wrong here, everything was working well until I imported the ParishModel class and I started seeing some red lines. First was the CreateState() and when I hover around it, it says ‘ShowAllParishPage.createState’ (‘dynamic Function()’) isn’t a valid override of ‘StatefulWidget.createState’ (‘State Function()’). (Documentation)
The member being overridden (framework.dart:42) and the second error was from the State which says Try specifying a different superclass, or removing the extends clause. Please I need help on how to resolve it.

you may have to run the code to see what the problem is but for some reason when I try to add a Stack widget to the container within the flexible space it splits the container in two, and the image only shows on the left instead of the whole container.