- Go to
Project Structure.

- Click tab
Moduleson the left sidebar. - Click your project and click the
plusicon.

- Add
Androidin theFramework

- Click
OKto finish.
Ref: https://github.com/flutter/flutter-intellij/issues/4994#issuecomment-856999849
Project Structure.
Modules on the left sidebar.plus icon.
Android in the Framework
OK to finish.Ref: https://github.com/flutter/flutter-intellij/issues/4994#issuecomment-856999849