Google Web Stories 1.11.0

The update to 1.12.0 or 1.13.0 will fix this. If you have added a snippet, you can remove it or just leave it. The stories validate without the error either way.

Google Web Stories plugin version 1.11.0 introduced a conflict with Yoast SEO resulting in duplicate canonical tags on the Web Stories. We anticipate Yoast 17.4 will fix this issue. Do not update Web Stories until that time.