" GTM no-script code not found: possibly lacking or not in " I test so as to add the script from the header.tpl but there is no portion. Update: Trouble was solved. I just use A different addon and personalize hook to do it. Many thanks Ali Edited November 21, https://addons.prestashop.com/es/seo-posicionamiento-buscadores/30904-etiquetas-automaticas-hreflang-canonical-etiquetas-seo.html