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Hi. I was having the exact same problem in a new prestashop store that I was creating. But I have another store where the module works fine, so I went to the backoffice to find the version of the module. The version that works well is "v5.1.2" and it comes for "prestashop" developers (of which I have a backup in my personal repository). The version that doesn't work (at least for this new store) is "v5.3.0", the one I downloaded from the official prestashop add-ons page and it comes from "ecommerce" developers.
I hope it helps you.