Someone in the Flutter community should be able to help you. Take a look at https://flutter.dev/community. Towards the bottom are links to various online Flutter resources.

To develop Flutter apps for Mac and iOS/iPadOS you need a Mac.

Someone in the Flutter community should be able to help you. Take a look at https://flutter.dev/community. Towards the bottom are links to various online Flutter resources.

in the the root level of your Flutter project, have you tried flutter clean and then flutter pub get ?