"Cannot read properties of undefined (reading 'stringify')" while setting up Storybook

I want to set up a repository that uses Storybook and Stylelint, but got the error below.

TypeError: Cannot read properties of undefined (reading 'stringify')
    at Function.stringify (#####/node_modules/postcss-syntax/stringify.js:8:38)
    at MapGenerator.generate (#####/node_modules/stylelint/node_modules/postcss/lib/map-generator.js:323:12)
    at LazyResult.stringify (#####/node_modules/stylelint/node_modules/postcss/lib/lazy-result.js:277:20)
    at LazyResult.runAsync (#####/node_modules/stylelint/node_modules/postcss/lib/lazy-result.js:443:17)
    at LazyResult.async (#####/node_modules/stylelint/node_modules/postcss/lib/lazy-result.js:221:30)
    at LazyResult.then (#####/node_modules/stylelint/node_modules/postcss/lib/lazy-result.js:206:17)

Here's the repository that reproduces this issue

How can I fix this?