Authorize subdomain to access and read user and admin cookies
I resolved my problem using that: (edited define(‘ADMIN_COOKIE_PATH’, ‘/wp-admin’); define(‘COOKIE_DOMAIN’, ‘.website.com’); define(‘COOKIEPATH’, “https://wordpress.stackexchange.com/”); define(‘SITECOOKIEPATH’, ‘.website.com’); define(‘COOKIEHASH’, md5(‘website.com’) );` COOKIEHASH is essential