Repository: storybook
Issue: getStorybook() errors with "Cannot read properties of undefined (reading 'stories')"
Labels: bug,needs triage

**Describe the bug**
We use [screener-storybook](https://github.com/screener-io/screener-storybook) to run visual test against our storybook stories.  It [uses require('@storybook/react').getStorybook to hook into storybook](https://github.com/screener-io/screener-storybook#testing-with-static-storybook-app).  Since 2 days ago the call to this API started failing consistently.  We did not change anything with storybook and I'm able to reproduce outside of our project and without `screener-storybook` so I don't think this is related to our configs or that library.  This also started happening at the same time across multiple independent repos.

**To Reproduce**
I tried to reproduce with `npx sb@next repro`, however I had issues with the generator so I reproduced here instead: https://stackblitz.com/edit/github-kza2ty?file=.storybook/preview.js

- Open that link
- Open console
- Wait for storybook to start
- Notice the error in console.

All I added from the default storybook setup is a call to `require('@storybook/react').getStorybook()`.

**System**
```
Environment Info:

  System:
    OS: macOS 12.6
    CPU: (10) x64 Apple M1 Pro
  Binaries:
    Node: 14.19.3 - ~/.nvm/versions/node/v14.19.3/bin/node
    Yarn: 1.22.19 - ~/.nvm/versions/node/v14.19.3/bin/yarn
    npm: 6.14.17 - ~/.nvm/versions/node/v14.19.3/bin/npm
  Browsers:
    Chrome: 105.0.5195.125
    Safari: 16.0
  npmPackages:
    @storybook/addon-a11y: ~6.5.12 => 6.5.12 
    @storybook/addon-actions: ~6.5.12 => 6.5.12 
    @storybook/addon-docs: ~6.5.12 => 6.5.12 
    @storybook/addon-essentials: ~6.5.12 => 6.5.12 
    @storybook/addon-interactions: ^6.5.12 => 6.5.12 
    @storybook/addon-links: ~6.5.12 => 6.5.12 
    @storybook/addon-storysource: ~6.5.12 => 6.5.12 
    @storybook/addons: ~6.5.12 => 6.5.12 
    @storybook/builder-webpack5: ^6.5.12 => 6.5.12 
    @storybook/components: ~6.5.12 => 6.5.12 
    @storybook/jest: ^0.0.10 => 0.0.10 
    @storybook/manager-webpack5: ^6.5.12 => 6.5.12 
    @storybook/react: ^6.5.12 => 6.5.12 
    @storybook/source-loader: ~6.5.12 => 6.5.12 
    @storybook/testing-library: ^0.0.13 => 0.0.13 
    @storybook/theming: ~6.5.12 => 6.5.12 
```

**Additional context**
I have tried downgrading the version of storybook back to 6.4 and even upgrading to latest 7.0-alpha.34 ([`stories` is now called `entries` in v7](https://github.com/storybookjs/storybook/blob/2dc0cbec02614ddc6ef1da3e8a29d39cd3770544/code/lib/client-api/src/ClientApi.ts#L418)) but still see the error, so it seems unrelated to the version of storybook.

**Error**
```
bootstrap:27 Uncaught TypeError: Cannot read properties of undefined (reading 'stories')
    at ClientApi.getStorybook (ClientApi.js:371:1)
    at ./.storybook/preview.js (preview.js:108:1)
    at __webpack_require__ (bootstrap:24:1)
    at fn (hot module replacement:62:1)
    at ./.storybook/preview.js-generated-config-entry.js (preview.js:112:1)
    at __webpack_require__ (bootstrap:24:1)
    at __webpack_exec__ (generated-stories-entry.cjs:6:1)
    at generated-stories-entry.cjs:6:1
    at __webpack_require__.O (chunk loade
```