Any time you include hreflang tags, ensure they all stage to indexable and crawlable pages. Check which tags are causing the problems and rectify them by ensuring the pages they’re pointing to are live.  It will likely help you add the default "x-default" tag for customers from international locations for https://artybookmarks.com/story18651099/the-greatest-guide-to-automatische-hreflang-tags-en-canonieke-tags-seo