6 demo BO, nonetheless I couldn't scroll right down to bottom of the side menu to access the module. It's because by default the menu does not scroll, so that you can't see the links to the bottom. There is a no cost module available to make the menu scrollable so https://www.presta-addons-modules.com/en/front-office/prestashop-seo-webmaster-site-verification-for-search-engines.html