Wordpress admin login cookies blocked error after moving servers

Question

Background: had a working Wordpress 3.7 site at olddomain.com.

I moved it to newdomain.com successfully, and in the process added this to wp-config:

Answer 1

I was getting this same error.

I had hard coded the Home and SiteURL in wp-config.php for a brand new website - no plugins even installed.

The problem: I had a space at the end of the URL.

define('WP_HOME','http://100.000.000.01/~acctname/wp ');
define('WP_SITEURL','http://100.000.000.01/~acctname/wp ');

Removing the space fixed this error.

define('WP_HOME','http://100.000.000.01/~acctname/wp');
define('WP_SITEURL','http://100.000.000.01/~acctname/wp');

Answer 2

I had the same problem with very similar circumstances and spec.

Eventually after trying all sorts of different solutions suggested online, I just renamed my active theme via FTP and then was able to login to the dashboard, I renamed my theme back and everything worked, I've no idea why but it may help somebody fix issues they're having.

Answer 3

I have found very good solution of this issue

There are possible following solutions for this error

1. Coding Error
2. Unnecessary Spaces in Code
3. Caching & Security Plugin

Check this article: https://www.scratchcode.io/cookies-are-blocked-or-not-supported-by-your-browser/