When you add hreflang tags, make sure they all level to indexable and crawlable pages. Check out which tags are causing the problems and rectify them by making certain the pages they’re pointing to are live.  Canonical URLs are used in order to avoid replicate content material and show to https://addons.prestashop.com/pt/seo-referenciamento-natural/31857-rich-snippets-automaticos-json-ld-opengraph-seo.html