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Hi Domenico,
Thanks for opening a new topic. The issue you have noticed on the Yoast metabox occurs when both Yoast SEO and Yoast SEO Premium plugins are not updated to the latest version.
As this forum is reserved for supporting the free version of Yoast SEO. As this topic is about a premium plugin, and as your site is using a premium plugin this thread has been marked as resolved per the forum guidelines.
Please contact our support team for assistance if you have an active premium subscription. How can I get premium support?
If you do not have an active premium subscription, you can either purchase a subscription or downgrade to the free version.