After you increase hreflang tags, assure all of them place to indexable and crawlable pages. Look at which tags are causing the problems and rectify them by making certain the pages they’re pointing to are Stay.  You should use Ahrefs to solve this challenge – just go to the listing https://addons.prestashop.com/de/seo-suchmaschinenranking-optimization/31857-automatische-google-rich-snippets-json-ld-opengraph-seo.html