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Fixing Multisite Error “Cookies are blocked or not supported by your browser. You must enable cookies to use WordPress.”

This page has had its content updated on November 17, 2023 EST by Jordan

The following error sometimes presents itself when trying to login to the subsite of a WordPress multisite.

ERROR: Cookies are blocked or not supported by your browser. You must enable cookies to use WordPress.

Add the following to your wp-config.php or user-configs.php if you’re on GridPane

 define('ADMIN_COOKIE_PATH', '/');
 define('COOKIE_DOMAIN', '');
 define('COOKIEPATH', '');
 define('SITECOOKIEPATH', '');

Some people have reported that the following will also work

define( 'COOKIE_DOMAIN', $_SERVER['HTTP_HOST'] );
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