Any time you insert hreflang tags, make certain all of them level to indexable and crawlable pages. Examine which tags are causing the problems and rectify them by ensuring the pages they’re pointing to are Dwell.  If none of these are typically utilised, Google will rely upon other alerts like https://addons.prestashop.com/es/seo-posicionamiento-buscadores/31857-google-rich-snippets-automatico-json-ld-opengraph-seo.html