Many wordpress users getting this error message when they try to login into the wordpress admin area:
Fatal error: Call to undefined function wp_dashboard_setup() in /home/username/public_html/wp-admin/index.php on line xxx
It seems that it is due to the PHP version and settings changed on the hosting server. In order to resolve this problem, you have to modify the wp-admin/index.php file.
Find this code in wp-admin/index.php:
require_once(ABSPATH . ‘wp-admin/includes/dashboard.php’);
This should resolve the problem.