After you include hreflang tags, make sure all of them point to indexable and crawlable pages. Test which tags are causing the issues and rectify them by ensuring the pages they’re pointing to are live.  2nd, In the event your material is accessible by using several URLs, other web sites https://addons.prestashop.com/nl/seo-zoekmachineoptimalisatie-vermelding/31857-automatische-google-rich-snippets-json-ld-opengraph-seo.html