Wordpress admin not loading css/js

Question

I'm having a problem with the admin on a Wordpress site. I've scoured the interwebs and seen lots of other people with the same problem, but no definite solution. The admin is showing like this:

And when I inspect it, I get a 500 (Internal Server Error) on both load-styles.php and load-scripts.php

Anyone know what's up, and how to rectify?

Answer 1

In wp-config.php before require_once add below code into file :

define('CONCATENATE_SCRIPTS', false);  

Answer 2

Just to keep everything in one answer, this worked for me:

define('FORCE_SSL_LOGIN', true); define('FORCE_SSL_ADMIN', true); define( 'CONCATENATE_SCRIPTS', false ); define( 'SCRIPT_DEBUG', true ); 

After page refreshing and it looks OK, maybe after re-login, set SCRIPT_DEBUG to false.

Don't forget about those last two settings if you're using a plugins for debugging or site optimization - though such plugins might override those settings.