If you insert hreflang tags, assure they all place to indexable and crawlable pages. Verify which tags are causing the issues and rectify them by making certain the pages they’re pointing to are Stay.  In the event you’re syndicating or republishing content on other internet sites, this is yet another https://addons.prestashop.com/es/seo-posicionamiento-buscadores/31857-google-rich-snippets-automatico-json-ld-opengraph-seo.html