"Failed to mount component: template or render function not defined" when running `npm run styleguide`

I get the following errors for all my components when trying to add styleguidest to an existing repo that is imported to other projects like a library as a submodule

[Vue warn]: Failed to mount component: template or render function not defined.

found in
---> <Modal> at vue/Modal.vue
       <Anonymous>
         <Root>

The structure is

- - vue/
- - - - Modal.vue
- - - - OtherComponents.vue
- - scss/
- - - - Modal.scss
- - - - OtherComponents.scss
- - styleguide.config.js
- - webpack.config.js

The styleguide config looks like this

module.exports = {
	title: 'Style Guide',
	components: './vue/**/[A-Z]*.vue',
	defaultExample: true,
	webpackConfig: require('./webpack.config'),
	exampleMode: 'expand'
}

and the webpack config is

const path = require('path');

module.exports = {
  module: {
    rules: [
      {
        include: [
          path.resolve(__dirname, "vue")
        ],
        exclude: /node_modules/,
        loader: "vue-loader"
      },
      {
        test: /\.js?$/,
        exclude: /node_modules/,
        loader: "babel-loader"
      },
      {
        include: [
          path.resolve(__dirname, "scss")
        ],
        loader: "sass-loader"
      }
    ]
  }
};

Any thoughts why this would be happening?

[elevatebart]

feel free to re-open if needed

[elevatebart]

You rock ! and thank you \o/