Cannot read property 'create' of undefined

I'm getting `Cannot read property 'create' of undefined` and don't know why. I followed the examples and still getting this.

``` js
// theme.js

export default {
color: {
primary: '#FF5A5F',
secondary: '#00A699'
}
}
```

```js
// styles.js

import ThemedStyleSheet from 'react-with-styles/lib/ThemedStyleSheet'
import { css, withStyles } from 'react-with-styles'
import MyTheme from './theme'

ThemedStyleSheet.registerTheme(MyTheme)

export { css, withStyles, ThemedStyleSheet }
```

```js
// index.js

import React from 'react'
import PropTypes from 'prop-types'
import { css, withStyles } from './styles'

function MyComponent({ styles }) {
return (

)
}

MyComponent.propTypes = {
styles: PropTypes.object.isRequired
}

export default withStyles(({ color }) => ({
firstLink: {
color: color.primary
},

secondLink: {
color: color.secondary
}
}))(MyComponent)
```

If I export like this
```js
export default withStyles()(MyComponent)
```
it works just fine, but I don't have the styles.

Start by reproducing the error with the supplied theme.js, styles.js, and index.js examples, then inspect the react-with-styles imports and ThemedStyleSheet.registerTheme call. Done means identifying why the styled callback receives an undefined value and documenting or verifying a working configuration that preserves the requested styles.

Written by the indexing model from the issue text.