[pdf-light-viewer] shortcode cannot be rendered due to the error: No converted pages found.

If PDF has been already converted, then probably there were some errors during the import. Please check <a href="https://www.smariamaggiorecerveteri.it/wp-admin/options-general.php?page=pdf-light-viewer" target="_blank">plugin error log on the settings page</a> and your site error log for errors.