Sorry, but you either have no stories or none are selected somehow.
If the problem persists, check the browser console, or the terminal you've run Storybook from.
Next Right Now includes a Storybook project built-in.
This section is about how Storybook is configured with Next Right Now.
If you want to see the default Storybook example come here!
src/stories/nrn/Welcome.stories.mdx