Repository: storybook
Issue:  @storybook/addon-actions@npm:6.5.0-alpha.64 causes configuration error
Labels: bug,addon: actions,has workaround,core

**Describe the bug**
Adding ` @storybook/addon-actions@npm:6.5.0-alpha.64` to the `addons` in the configuration results in an error.

**To Reproduce**

`package.json` deps (`next` is currently `6.5.0-alpha.64`):
```
    "@storybook/addon-actions": "next",
    "@storybook/addon-controls": "next",
    "@storybook/addon-docs": "next",
    "@storybook/addon-links": "next",
    "@storybook/addons": "next",
    "@storybook/api": "next",
    "@storybook/builder-webpack5": "next",
    "@storybook/components": "next",
    "@storybook/core-events": "next",
    "@storybook/manager-webpack5": "next",
```

`main.js`:
```

module.exports = {
  core: {
    builder: "webpack5",
  },

  features: {
    previewMdx2: true,
  },

  stories: ['./*.stories.js', './stories/*.stories.js', '../../**/*.stories.(js|ts|tsx)'],
  addons: ['@storybook/addon-docs', '@storybook/addon-actions', '@storybook/addon-links', '@storybook/addon-controls'],
};
```

run command:
```
yarn run start-storybook
```

results in error:
```
info => Loading presets
ERR! TypeError: (intermediate value) is not iterable
ERR!     at _default (/Users/jvalore/Projects/mindful-ui/.yarn/__virtual__/@storybook-builder-webpack5-virtual-f6bab782af/0/cache/@storybook-builder-webpack5-npm-6.5.0-alpha.64-6b61656f32-8eefb6f4eb.zip/node_modules/@storybook/builder-webpack5/dist/cjs/preview/iframe-webpack.config.js:70:22)
ERR!     at processTicksAndRejections (node:internal/process/task_queues:96:5)
ERR!     at async starterGeneratorFn (/Users/jvalore/Projects/mindful-ui/.yarn/__virtual__/@storybook-builder-webpack5-virtual-f6bab782af/0/cache/@storybook-builder-webpack5-npm-6.5.0-alpha.64-6b61656f32-8eefb6f4eb.zip/node_modules/@storybook/builder-webpack5/dist/cjs/index.js:116:16)
ERR!     at async Object.start (/Users/jvalore/Projects/mindful-ui/.yarn/__virtual__/@storybook-builder-webpack5-virtual-f6bab782af/0/cache/@storybook-builder-webpack5-npm-6.5.0-alpha.64-6b61656f32-8eefb6f4eb.zip/node_modules/@storybook/builder-webpack5/dist/cjs/index.js:272:14)
ERR!     at async Promise.all (index 0)
ERR!     at async storybookDevServer (/Users/jvalore/Projects/mindful-ui/.yarn/__virtual__/@storybook-core-server-virtual-66e8f1bae6/0/cache/@storybook-core-server-npm-6.5.0-alpha.64-3829db92dd-a417498b98.zip/node_modules/@storybook/core-server/dist/cjs/dev-server.js:139:28)
ERR!     at async buildDevStandalone (/Users/jvalore/Projects/mindful-ui/.yarn/__virtual__/@storybook-core-server-virtual-66e8f1bae6/0/cache/@storybook-core-server-npm-6.5.0-alpha.64-3829db92dd-a417498b98.zip/node_modules/@storybook/core-server/dist/cjs/build-dev.js:118:31)
ERR!     at async buildDev (/Users/jvalore/Projects/mindful-ui/.yarn/__virtual__/@storybook-core-server-virtual-66e8f1bae6/0/cache/@storybook-core-server-npm-6.5.0-alpha.64-3829db92dd-a417498b98.zip/node_modules/@storybook/core-server/dist/cjs/build-dev.js:164:5)
ERR!  TypeError: (intermediate value) is not iterable
ERR!     at _default (/Users/jvalore/Projects/mindful-ui/.yarn/__virtual__/@storybook-builder-webpack5-virtual-f6bab782af/0/cache/@storybook-builder-webpack5-npm-6.5.0-alpha.64-6b61656f32-8eefb6f4eb.zip/node_modules/@storybook/builder-webpack5/dist/cjs/preview/iframe-webpack.config.js:70:22)
ERR!     at processTicksAndRejections (node:internal/process/task_queues:96:5)
ERR!     at async starterGeneratorFn (/Users/jvalore/Projects/mindful-ui/.yarn/__virtual__/@storybook-builder-webpack5-virtual-f6bab782af/0/cache/@storybook-builder-webpack5-npm-6.5.0-alpha.64-6b61656f32-8eefb6f4eb.zip/node_modules/@storybook/builder-webpack5/dist/cjs/index.js:116:16)
ERR!     at async Object.start (/Users/jvalore/Projects/mindful-ui/.yarn/__virtual__/@storybook-builder-webpack5-virtual-f6bab782af/0/cache/@storybook-builder-webpack5-npm-6.5.0-alpha.64-6b61656f32-8eefb6f4eb.zip/node_modules/@storybook/builder-webpack5/dist/cjs/index.js:272:14)
ERR!     at async Promise.all (index 0)
ERR!     at async storybookDevServer (/Users/jvalore/Projects/mindful-ui/.yarn/__virtual__/@storybook-core-server-virtual-66e8f1bae6/0/cache/@storybook-core-server-npm-6.5.0-alpha.64-3829db92dd-a417498b98.zip/node_modules/@storybook/core-server/dist/cjs/dev-server.js:139:28)
ERR!     at async buildDevStandalone (/Users/jvalore/Projects/mindful-ui/.yarn/__virtual__/@storybook-core-server-virtual-66e8f1bae6/0/cache/@storybook-core-server-npm-6.5.0-alpha.64-3829db92dd-a417498b98.zip/node_modules/@storybook/core-server/dist/cjs/build-dev.js:118:31)
ERR!     at async buildDev (/Users/jvalore/Projects/mindful-ui/.yarn/__virtual__/@storybook-core-server-virtual-66e8f1bae6/0/cache/@storybook-core-server-npm-6.5.0-alpha.64-3829db92dd-a417498b98.zip/node_modules/@storybook/core-server/dist/cjs/build-dev.js:164:5)
```

Removing `@storybook/addon-actions` from the `addons` array fixes the error.

**System**

```
  System:
    OS: macOS 10.15.7
    CPU: (16) x64 Intel(R) Core(TM) i9-9980HK CPU @ 2.40GHz
  Binaries:
    Node: 16.14.0 - ~/.nvm/versions/node/v16.14.0/bin/node
    Yarn: 3.2.0 - ~/.yarn/bin/yarn
    npm: 8.3.1 - ~/.nvm/versions/node/v16.14.0/bin/npm
  Browsers:
    Chrome: 100.0.4896.88
    Firefox: 98.0.2
    Safari: 13.1.3
```

**Additional context**
Add any other context about the problem here.