" GTM no-script code not found: both lacking or not in " I consider to incorporate the script inside the header.tpl but there's no portion. Update: Trouble was solved. I just use A different addon and personalize hook to get it done. Thanks Ali Edited November 21, 2018 by QNP https://addons.prestashop.com/it/seo-indicizzazione-naturale/30904-tag-hreflang-automatici-e-tag-canonici-seo.html