" GTM no-script code not found: both missing or not in " I test so as to add the script within the header.tpl but there's no segment. Update: Trouble was solved. I just use A different addon and customize hook to make it happen. Many thanks Ali Edited November 21, https://addons.prestashop.com/ru/seo-natural-search-engine-optimization/30904--hreflang-seo.html