Warning: Illegal string offset in 11.1.1

If this is the issue you are experiencing: https://github.com/Yoast/wordpress-seo/issues/12811 this was corrected as of the 11.2 release of Yoast SEO. Can you please try updating the version to 11.2 and see whether this resolves the warning?

This thread has been marked as resolved due to lack of activity.

You’re always welcome to re-open this topic. Please read this post before opening a new request.

Thanks for understanding!