" GTM no-script code not found: possibly missing or not in " I attempt to incorporate the script inside the header.tpl but there's no section. Update: Issue was solved. I just use An additional addon and personalize hook to make it happen. Thanks Ali Edited November 21, 2018 by QNP https://addons.prestashop.com/es/seo-posicionamiento-buscadores/30904-etiquetas-automaticas-hreflang-canonical-etiquetas-seo.html