When you insert hreflang tags, be certain they all stage to indexable and crawlable pages. Test which tags are causing the issues and rectify them by ensuring the pages they’re pointing to are Reside.  Canonical tags aren't the only real way to declare a web site’s canonical. You may use https://addons.prestashop.com/en/seo-natural-search-engine-optimization/31857-automatic-google-rich-snippets-json-ld-open-graph-seo.html