" GTM no-script code not found: possibly lacking or not in " I consider to incorporate the script while in the header.tpl but there is no area. Update: Issue was solved. I just use A different addon and personalize hook to get it done. Thanks Ali Edited November 21, 2018 https://www.presta-addons-modules.com/en/seo/prestashop-seo-automatic-hreflang-tags-canonical-tags-on-all-pages.html