[Bug]: Code examples are not working with "Incompatible React versions" error.

[Julienng]

Summary

I have an error on all code examples on the site: blog, doc, etc.

Error
Incompatible React versions: The "react" and "react-dom" packages must have the exact same version. Instead got:
  - react:      19.3.0-canary-96fcba90-20260728
  - react-dom:  19.3.0-canary-1724e9ce-20260729
Learn more: https://react.dev/warnings/version-mismatch

Page

https://react.dev/reference/react/ViewTransition#animating-an-element-on-enter

Details

[MaxwellCohen]

I am seeing this too.
This appears to be a caching issue with CodeSandbox. When you click fork, it appears to be working on the CodeSandbox website.
Do @gaearon, @eps1lon, or @rickhanlonii have access to react.dev's codesandbox settings to reset the cache?

[Julienng]

It seems the cache was reset between ticket creation and this week