[docs] Demo FadeModalDialog crashes

[Alex629138]

• I have searched for similar issues in this repository and believe that this is not a duplicate.

Steps to reproduce

1. Visit https://mui.com/joy-ui/react-modal/
2. ??
3. demo FadeModalDialog crashes

Your environment

Tech	Version
Version	v7.1.1
Netlify deploy	https://683d490c8c844c00084d5396--material-ui-docs.netlify.app
Browser	Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36

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