How I can resolve the hreflang tag error?
International Targeting | Language > 'es-es' - no return tags
URLs for your site and alternate URLs in 'es-es' that do not have return tags.
5 Hreflang Tags with Errors
Go to phpMyAdmin by means of your site control board.
find and replace url in wordpress database
The left board list the entirety of your information bases. Select the one associated with your WordPress site and head to the SQL tab.
Enter the accompanying SQL question:
The exact opposite thing we have to do is check the changes.
you need to have a 1-1 relationship between your pages and have return tags.
canonical to the ENGLISH page, alternate language ES-ES, and EN-US
canonical to the SPANISH page, alternate language ES-ES, and EN-US
so that Google will see that both "page-a-in-SPANISH" AND "/page-a-in-english" refer to each other
hope this helps you, good luck with that