wp-admin white page

Hi I am using the theme architecture, and works fine on localhost using xampp, but when using the online server I get blank page when accessing wp-admin and also to access the categories, the version of wordpress 4.2.2.
what is the solution?

Hi!

Could you also turn on the option wp-debug to get more information about the error? You can do it in the wp-config.php in the root directory of your WordPress. Just find string

define('WP_DEBUG', false);

there, and replace it with

define('WP_DEBUG', true);

. In this case you will be able to see the error and find out the reason for this problem.