Fixes a bug where editing a content type item (page/post) would result in a blank page (Fatal error) when the metabox is disabled for that type.
Bugfixes: Fixes a bug where the internal linking box is shown for post types that has the Yoast Metabox disabled. Fixes internal linking button size in the document settings sidebar in Gutenberg. Fixes a bug where no redirect notification was shown in Gutenberg when the permalink was updated. Fixes a bug where the social previews won’t reflect the entered post/page title realtime. Other: Adds additional context to the wpseo_premium_post_redirect_slug_change filter call.
Enhancements: Improves an SQL query to perform better on sites with a lot of orphaned content. Bugfixes: Fixes a bug where the activation warning would be incorrectly displayed on a sub-site within a multisite environment. Fixes a bug where a PHP warning would be displayed when php_uname has been disabled for security reasons. Fixes a bug where a PHP notice would be displayed when visiting a non-existing post. Other: Includes every change in Yoast SEO core 9.1.0 see the core changelog.
