In additon to elisolution's response over, this also checks no matter if we are literally on the house site (not just if the canonical was set or not). I examined this Resolution a tad and as far as I'm able to see, it really works as predicted. Otherwise, you should allow https://addons.prestashop.com/it/seo-indicizzazione-naturale/31857-google-rich-snippet-automatico-json-ld-open-graph-seo.html