TypeError: Cannot read property 'insertAfter' of undefined

package.json

{
  "name": "css-declaration-sorter-issue-170",
  "version": "1.0.0",
  "description": "",
  "scripts": {
    "build": "mix --production"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {},
  "devDependencies": {
    "laravel-mix": "^6.0.27",
    "resolve-url-loader": "^4.0.0",
    "sass": "^1.38.0",
    "sass-loader": "^12.1.0"
  }
}

test.scss

.class {
  /*!rtl:begin:ignore*/
  direction: ltr;
  /*!rtl:end:ignore*/
}

webpack.mix.js

let mix = require('laravel-mix');

mix.sass('test.scss', 'dist', {
    sassOptions: {
        //outputStyle: 'expanded'
    }
});