" GTM no-script code not found: possibly lacking or not in " I test to incorporate the script from the header.tpl but there's no part. Update: Difficulty was solved. I just use An additional addon and customize hook to get it done. Many thanks Ali Edited November 21, 2018 by https://addons.prestashop.com/de/seo-suchmaschinenranking-optimization/30904-automatische-hreflang-tags-und-kanonische-tags-seo.html