Error: The package path ./dist/react-datepicker.css is not exported from package.json in Storybook.

[Aluisio]

A clear and concise description of what the bug is.

After updating Storybook to version 9.1.2, when running the npm run storybook command, I'm getting the error:
Module not found: Error: Package path ./dist/react-datepicker.css is not exported from package.json

My project has the following packages installed:

@storybook/addon-docs": "^9.1.3,
@storybook/addon-links": "^9.1.3,
@storybook/nextjs": "^9.1.3,
storybook": "^9.1.3

Apparently the error is related to the @storybook/nextjs package, because if I revert to the @storybook/nextjs:9.1.1 package version, Storybook works again.

analyzing the exports section of package.json, the export configuration appears to be invalid for the syntax:

"exports": {
    ".": {
      "import": {
        "types": "./dist/index.d.ts",
        "default": "./dist/index.es.js"
      },
      "require": {
        "types": "./dist/index.d.ts",
        "default": "./dist/index.js"
      }
    },
    "./dist/*.css": "./dist/*.css",
    "./src/stylesheets/*.scss": "./src/stylesheets/*.scss"
  },

Analyzing the exports section of package.json, the export configuration appears to be invalid for the syntax.

Changing it to "./dist/*": "./dist/*" makes Storybook work again.

[Aluisio]

After further research, I realized this issue is old.
There are already some other issues referencing the same problem, such as #5437 #1882 and they all point to this CSS export issue.

@martijnrusschen can you help us?

[Aluisio]

Fixed in #6033