Error while building with yarn

I am getting an error in ./electron/index.js

ERROR in ./electron/index.js 13:4
Module parse failed: Unexpected token (13:4)
You may need an appropriate loader to handle this file type.
```
|
| storePromise.then(({store}) => render(
     <I18nextProvider i18n={i18n}>
|         <Provider store={store}>
|             <Component />
```
