#concatenate_scripts

I didn't do anything, but the "quick edit" menu was suddenly no longer working. I disabled all plugins and changed theme to default one, it still didn't work. I thought maybe the problem was JavaScript, but I didn't know how to fix it. I googled, and I found the solution. though this solution was not created for my problem, it worked. Below is it. Add this line to wp-config.php:

define('CONCATENATE_SCRIPTS', false);