Whenever you include hreflang tags, ensure all of them place to indexable and crawlable pages. Verify which tags are causing the problems and rectify them by ensuring that the pages they’re pointing to are Reside.  There are actually 3 ways to incorporate hreflang tags to webpages (by incorporate, we don’t https://sparxsocial.com/story9096322/considerations-to-know-about-prestashop-google-tag-manager