Flutter packages get does not install new package
hi I have a similar problem I deleted a package from the dart packages folder and when I run flutter pub run it won't download and work so I tried all the way people said but something worked for me is I tried to repairing pub cache and it worked just run
flutter pub cache repair
so basically run:
flutter clean
flutter packages get
flutter packages upgrade
Restart Android Studio or Visual Studio
you can restart VSC by:
ctrl + shift + P and then a search bar will appear and then type: "restart" and smash the Enter key.
Close and open your editor. Worked for me ;)