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.

what version did you used? mine is `3.10.1` but still got the error — msmaromi, May 11 '20 at 00:41
Restart VsCode, if its not working then check you channel and change it to stable and upgrade the stable version to latest and then try — The Chinky Sight, May 30 '20 at 11:57
That happened to me, when I had two project opened in VS Code - one from Beta channel, other from Stable. Reopening VS Code fixed it. — zgorawski, Jun 04 '20 at 09:08

score 8 · Answer 1 · answered May 11 '20 at 02:42

8

echo.

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

good flutter life!

answered May 11 '20 at 02:42

ankomoti

81
2

Thanks for the answer. I reinstalled Flutter extension too in the beginning, but it didn't work for me. I ended up upgrading Flutter then it works. – echo May 14 '20 at 18:25

score 5 · Answer 2 · answered May 26 '20 at 10:00

5

For me restarting the VS Code did the Job.

answered May 26 '20 at 10:00

nani

183
2
15

score 3 · Answer 3 · answered Jul 09 '20 at 13:36

3

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

answered Jul 09 '20 at 13:36

zlaayaa

585
2
6
25

score 0 · Answer 4 · answered May 16 '20 at 09:12

0

I had the same problem, I just upgraded Flutter and it works.

answered May 16 '20 at 09:12

Bashar ALAYAN

19
1
5

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

4 Answers4