" GTM no-script code not found: both lacking or not in " I try to add the script within the header.tpl but there's no portion. Update: Difficulty was solved. I just use A different addon and personalize hook to get it done. Many thanks Ali Edited November 21, 2018 by https://bookmarksaifi.com/story17857895/5-essential-elements-for-prestashop-vs-opencart