Whenever you incorporate hreflang tags, guarantee they all point to indexable and crawlable pages. Look at which tags are causing the problems and rectify them by ensuring the pages they’re pointing to are Dwell.  You need to use Ahrefs to unravel this difficulty – just Visit the listing of pages https://bookmarkangaroo.com/story18900357/what-does-hreflang-tags-wordpress-mean