Can't get autoprefixer to work

[hmalaud]

Trying to add autoprefixing to compilation, I add the following line to my project's .vscode/settings.json file:

{
  "less.compile": {
    "main": "${workspaceFolder}/1.0/styles.less",
    "out": "${workspaceRoot}\\1.0\\css\\",
    "autoprefixer": "Chrome > 1, Firefox > 1"
  }
}

The main/out are working fine, but the autoprefixer part (browsers' versions are low on purpose to check if the generated css shows any prefixed value) is not. Am I missing something?

[hmalaud]

Sorry for the disturbance, after trashing my workspace and recreating it the autoprefixing started working.