" GTM no-script code not found: either missing or not in " I attempt to add the script during the header.tpl but there's no area. Update: Challenge was solved. I just use A further addon and personalize hook to get it done. Many thanks Ali Edited November 21, 2018 by https://addons.prestashop.com/pl/seo-pozycjonowanie-naturalne/30904-automatyczne-tagi-hreflang-i-tagi-kanoniczne-seo.html