Your Xcode version may be too old for your iOS version

Question

I have updated my phone\'s OS version to iOS 14 and spent today updating Xcode to version 12, yet when I try to build my Flutter app on my iPhone 11 - iOS 14 through Android Stu

Answer 1

Ran into this issue today on Visual Studio. It appeared that my Dart SDK version was too out of date and upgrading it appeared to fix the problem.

I did upgrade my Flutter version first, and then ran into a problem with the vsync property of AnimationController not being recognized, which was solved by upgrading the Dart SDK, so I'm not sure who the real culprit was (or if it was a combination of both).

Instructions on upgrading your Dart SDK: https://dart.dev/get-dart