Could not find an option named "web-server-debug-protocol" when running a Flutter project through VSCode

Question

I am using VSCode ad my Flutter development IDE. It worked well until this afternoon. When I ran the project, Could not find an option named "web-server-debug-protocol"showed up. I have no idea what goes wrong. I googled "web-server-debug-protocol" and only found two links showed that it exists in the flutter_command.dart. Did anyone meet the similar problem? Any suggestions about that? Thanks!

UPDATE I solved this issue by upgrading my Flutter.

Answer 1

echo.

I reinstalled Flutter extension in VS Code and it worked properly.

good flutter life!

Answer 2

For me restarting the VS Code did the Job.

Answer 3

Just restart VS code. It often happens when you switch between Flutter channels, but restart should fix it...