The react in es6 defines the defaultProps error in the component.

[huangjihua]

taxError: /Users/huangjihua/Documents/autohome/projects/re-bulma/src/components/panel/panel-tabs.js: Unexpected token (6:19
`export default class PanelTabs extends Component {

6 | static propTypes = {
| ^
7 | children: PropTypes.any,
8 | className: PropTypes.string,
9 | style: PropTypes.object,
`
Defining the static property is not es6, and in the es7 draft, install the babel-preset-stage-0 and try again after the babelrc reference, but not yet.

[davidnguyen11]

I solved by below steps:
replace .babelrc content with this content

{
  "presets": ["react", "es2015", "stage-1"]
}

run commands below:

yarn run build
yarn run styleguide-server