Failed to start DevTools: Dart DevTools exited with code 255-CodePudding

I am getting this error code in my vscode. How to fix it? I am using flutter v2.5.3.

https://i.stack.imgur.com/nJy9U.png

CodePudding user response：

You can try fixing it by running this in the terminal:

Just copy and paste the below code in terminal and run it.

dart pub global activate devtools -v 2.8.0

which downgrades the version to 2.8.0 (that works fine). Found answer on github

CodePudding user response：

This worked for me too, Had to downgrade from 2.14.2 to 2.8.0 I don't know why this error is just coming up today, but I think there's an issue with Dart Engine

CodePudding user response：

In VS Code extensions I switched the Dart plugin to Pre-Release mode and extension loaded successfully. It worked for now, but being Pre-Release it may come up with its own issues later.