[Bug]: manager-api / manager.js doesn't work

[Energiz3r]

Describe the bug

manager-api / manager.js doesn't work

Every time storybook is run it defaults to the Addon panel taking up half the page, and the sidebar hidden. I'm trying to fix that.

To Reproduce

Follow the doco and try to configure anything: https://storybook.js.org/docs/configure/features-and-behavior

System

npx storybook@latest info
Need to install the following packages:
  storybook@8.0.10
Ok to proceed? (y) n

Yeah so no,

"@storybook/addon-essentials": "^7.5.3",
    "@storybook/addon-interactions": "^7.5.3",
    "@storybook/addon-links": "^7.5.3",
    "@storybook/addon-themes": "^7.5.3",
    "@storybook/blocks": "^7.5.3",
    "@storybook/manager-api": "^8.0.10",
    "@storybook/nextjs": "^7.5.3",
    "@storybook/react": "^7.5.3",
    "@storybook/testing-library": "^0.2.2",

### Additional context

I also added the manager-api to the plugin list in `./storybook/main.ts` which made no difference. The doco doesn't mention anything about setup or install so it's anyone's guess whether any steps are required.

[shilman]

We completely overhauled the way this works in Storybook 8.0. Please try upgrading and let us know if you run into the same problem.

Migration guide: https://storybook.js.org/docs/8.0/migration-guide