In this problem user won’t be able to logged in to his WordPress website account. He has a problem regarding logging on his website that runs on WordPress. He upgraded WordPress to 3.3.1. Everything worked fine till this morning but now he couldn’t login anymore on WordPress, and he just got a blank page. The username and password are totally correct. He has deleted all the plugins from wp-content/plugins folder to see if there is a problem with them and made the upgrade again but no results found. He has installed the older version of WordPress, again, and still no result. Visually website is running very well. He cannot be able to access the Dashboard any more.
Solution is very simple. Sometimes in hurry we made a little mistake and then unable to find that. User forget one step, to see if there is a problem with his custom theme. He has deleted the basic theme Twenty Ten from “wp-content/themes” and left his custom theme there. That custom theme has a bug, because every time he make some changes, add and modify articles and manage some comments it shows that blank page. Unable to refresh the page, or anything else.
So he renamed the folder “themes” to something else and then his Dashboard started to work. Here is a tip that renaming the folder “themes” will shows a blank page on your website and you can’t see anything else, so keep a basic theme on folder “themes” to avoid this mashup.