When you choose Google rich snippet or Schema.org example, you ought to overwrite test input data with your possess.You may include or remove fields/Homes that You do not use. Please check the demo instance down below, in which the module is set up and configured in debug method. It's working https://addons.prestashop.com/fr/seo-referencement-naturel/31857-seo-automatique-google-rich-snippets-json-ld-open-graph.html