" GTM no-script code not found: both lacking or not in " I try so as to add the script during the header.tpl but there is no portion. Update: Dilemma was solved. I just use One more addon and customize hook to get it done. Thanks Ali Edited November 21, https://addons.prestashop.com/de/seo-suchmaschinenranking-optimization/30904-automatische-hreflang-tags-und-kanonische-tags-seo.html