Error in Rollup section

In the Rollup section, a section is written:
For a complete setup example see this gist.
And the word /* see this gist. */
Link to a restricted page
This limitation causes problems in teaching. Please change to another type.
Link address:
https://gist.github.com/Rich-Harris/cb14f4bc0670c47d00d191565be36bf0

The error I receive:

This secret gist has been disabled.
It appears your account may be based in a U.S.-sanctioned region. As a result, due to U.S. trade controls law restrictions, we are unable to provide private repository services and paid services for your account. GitHub has preserved, however, your access to certain free services for public repositories. If your account has been flagged in error, and you are not located in or resident in a sanctioned region, please file an appeal. Please read about GitHub and Trade Controls for more information.

React のパフォーマンスドキュメントの Rollup セクションを開き、リンク先の Rich Harris の gist を確認します。制限されている gist への参照をアクセス可能な代替手段に置き換え、その後、セクションが読者を無効化されたページに誘導しなくなっていることを確認します。