Fixes a bug where older browsers couldn't load the content analysis. This applies to Internet Explorer (10 and lower) and Safari (9.1 and lower).
Fixes a bug where the Yoast Metabox wouldn't be shown for posts set to noindex, therefore making it impossible to change it back to index, view Readability scores and not being able to optimize a post, before allowing it to be indexed.
Fixes a bug where translations wouldn't be applied in the Yoast SEO Metabox for SEO and Readability scores.