Error loading withAuthenticator with aws-amplify-react-native

Using the aws amplify auth for mobile mode works well but for the web mode shows this error: Can’t find AmplifyTheme variable

This is the code (comes from the official website)

```tsx
import { withAuthenticator } from 'aws-amplify-react-native';
import Amplify from 'aws-amplify';
// Get the aws resources configuration parameters
import awsconfig from './aws-exports'; // if you are using Amplify CLI

Amplify.configure(awsconfig);

// ...

export default withAuthenticator(App);
```

Thanks in advance!