This application is not configured to build on the web. To add web support to a project, run flutter create .. Launching lib\main.dart on Chrome in debug mode... Waiting for connection from debug service on Chrome... Error: Cannot run with sound null safety, because the following dependencies don't support null safety:

• package:flutter_speed_dial

For solutions, see https://dart.dev/go/unsound-null-safety Unhandled exception:

CodePudding user response：

You will need at least version 3.0.0 of that package to have null safety.

Given that they are at version 5.0.0 right now, you should probably update your packages every once in a while.

CodePudding user response：

you will need to latest version and if you want to run without latest version you need to run this command

$ flutter run --no--sound-null-safety