Did you catch the latest update from Google? Today they made some small changes to how they read XML sitemaps. But you don't have to worry about that - today's Yoast SEO 18.8 update already applies the latest standards. Read more about what's new in Yoast SEO 18.8 in our release post in English or our release post in Spanish!
- Removes XML sitemap image properties
captionfollowing deprecation by Google.