Flutter Program ver 3.7.6 and Android Studio Eel ver 2022.1.1 Patch 1

Saw this Youtube program for a flutter todo list program.

Downloaded and ran it.

The pubspec.yaml ran pub get and I get this error msg see 2nd screenshot below the first screenshot. How to do symlink support.

On a Windows 10 OS and my developers option is set to on. See 1st screenshot.

Flutter Program ver 3.7.6 and Android Studio Eel ver 2022.1.1 Patch 1

What implementation code to put under TodoListState trying to create

a todo list for flutter project. See screenshot below

Flutter Program ver 3.7.6 and Android Studio Eel ver 2022.1.1 Patch 1

How to fix this line Invalid use of private type in public api

Device Manager in Android Studio Eel version is grayed out. Flutter project was from Android Studio Dolphin. I don't see any errors in Flutter. See screenshots of all my dart files and android Studio Eel notice device manager and play button  is grayed out.

main.dart - No issue see screenshot.

second.dart - No issue see screenshot

third.dart - No issue see screenshot

bt1.dart - No issue see screenshot

Android Studio Eel version both device manager and play button is grayed out. See screenshot