rror: Cannot run with sound null safety, because the following dependencies don't support null safety: code example
Example 1: Error: Cannot run with sound null safety, because the following dependencies don't support null safety:
flutter run --no-sound-null-safety
Example 2: cannot run with sound null safety because the following dependencies don't support null safety
---- Add before imports of file main.dart ----
// @dart=2.9
void main() {
.........
}