dart-null-safety

Don’t downgrade Flutter Problem: This error occurs when you use a bang operator (!) on a nullable instance which wasn’t initialized. For example: String? string; // Nullable String void main() { var len = string!.length; // Runtime error: Null check operator used on a null value } Solutions: Open the logs and there must be … Read more

First, you should read through the guide to understand unsound null safety. If you are sure that you want to run your application with unsound null safety, you can use the following command: flutter run –no-sound-null-safety The –no-sound-null-safety option is not documented in the article, however, I have not experienced any problems with it for … Read more