I installed the SEO plugin yesterday and have set up all features as required. This morning, having not made any additional changes, the SEO box underneath any Post or Page states:
Fatal error: Cannot use object of type WP_Error as array in (website...)public_html/wp-content/plugins/wordpress-seo/admin/class-metabox.php on line 665
Does anyone know what may have caused this and how I can go about fixing it? Since the error, I cannot see any text in my posts or pages, and therefore have no ability to add or amend blogs.