Here is the original article from Android Police:
https://www.androidpolice.com/2021/07/20/a-new-chrome-os-91-...
The reason for the failed "update" was another Chrome 0-day that relies on the Google's Javascript engine:
https://www.androidpolice.com/2021/07/16/another-day-another...
Curious whether they release the details of how this 0-day works after it is fixed, so we can see the mistake they made putting users at risk.