The directory /wp/domande-stelle-di-natale-e-qualche-capello-bianco-ma-conte-schiva-tutto-e-non-perde-mai-il-controllo/ does not contain an index file.
You have to create a page called index.html, index.htm or index.php (lower case).
Warning: if you have just activated your site you might have to wait up to 24 hours before it is visible.