Recently I received an email from a customer. She was dismayed that all the icons on her post editor were gone. Instead of seeing the normal visual editor, she saw a white box with no controls. What happened?
I looked at the usual suspects, the plugins and the themes. But with all the plugins turned off and a default WordPress theme selected the error persisted.
I did some research and hit upon the solution. I added the following to the bottom of the wp-config.php file just before the require_once line:
define(‘CONCATENATE_SCRIPTS’, false );
The problem is fixed!
Why Did it Work?