What would cause WordPress admin screen to be blank, except for nav bar?

Question

So I\'ve read through all the similar questions and can\'t find a solution here. Basically the user-facing site looks fine and is functioning properly. The WP Admin, howev

Answer 1

FYI, I had the exact same problem, and this solution worked for me. ie: change:

echo self::$this->_help_sidebar;

to

echo $this->_help_sidebar;