" GTM no-script code not found: possibly missing or not in " I check out to include the script from the header.tpl but there is no section. Update: Issue was solved. I just use One more addon and personalize hook to do it. Many thanks Ali Edited November 21, 2018 https://addons.prestashop.com/de/seo-suchmaschinenranking-optimization/30904-automatische-hreflang-tags-und-kanonische-tags-seo.html