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 came across this error when trying to install a wordpress site on localhost. The problem was this line inside the .htaccess

Header edit Set-Cookie ^(.*)$ $1;HttpOnly;Secure

It prevents cookies being set if not on https. Just had to remove the line.