This error has existed since 3.0 which was released in May 2010.

It's nonsensical to refer to a parent selector at the base-level of a stylesheet. Inferring that & should be the universal selector at the root level is not at all a safe assumption. Additionally, this is often indicative of a coding mistake. So we consider it an error.

If this was part of a mixin that is sometimes included at the base level and sometimes nested, you can write the mixin like this:

@mixin break-accessibility {
  #{if(&, "&", "*")}:focus {
    outline: none;
  }
}
@include break-accessibility;
.foo {@include break-accessibility;}

Ah thanks, just funny it first error out after i updated :)

I've got that error when moved from "node-sass": "4.7.2" to "node-sass": "4.9.0", so if you need your working project urgently you can set up your previous version in devDependencies in package.json and continue to work.