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

Indeed this worked for me too, changing to

_help_sidebar; ?>

I believe it is a matter of the php version we use

Check here to understantd self:: functionality :

http://www.diffen.com/difference/self_(PHP)_vs_this_(PHP)