Failed to compile

[damanloox]

I'm trying to use semantic-ui-less with existing vue.js 2 project.
I'm getting the following:

 ERROR  Failed to compile with 1 errors                                                                                                  

 error  in ./node_modules/semantic-ui-less/semantic.less

Module build failed:

// load the styles
var content = require("!!../css-loader/index.js??ref--9-1!../postcss-loader/lib/index.js??ref--9-2!../less-loader/dist/cjs.js??ref--9-3!./semantic.less");
          ^
Unrecognised input
      in (some_path)/node_modules/semantic-ui-less/semantic.less (line 4, column 12)

Here's my webpack config:

  module: {
    rules: [
      {
       test: /\.css$/,
       use: ['vue-style-loader', 'css-loader']
      },
      {
        test: /\.less$/,
        use: ['vue-style-loader', 'css-loader', 'less-loader']
      },
      {
        test: /\.vue$/,
        loader: 'vue-loader',
        options: vueLoaderConfig
      },
     (...)
```
Any ideas what I'm doing wrong?