WordPress wp-admin does not load css style problem and how to fix it

Did you ever encounter “load-styles.php 404 error” ?

Sometimes it happens that our dashboard page of our WordPress site does not load properly. If we check the console window, personally I see this error:

load-styles.php?c=0&dir=ltr&load%5Bchunk_0%5D=dashicons,admin-bar,common,forms,admin-menu,dashboard,list-tables,edit,revisions,media,themes,about,nav-menus,wp-pointer,widgets&load%5Bchunk_1%5D=,site-icon,l10n,buttons,wp-auth-check&ver=6.7.2:1

Failed to load resource: the server responded with a status of 404 ()

load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,wp-hooks,utils,wp-dom-ready&ver=6.7.2:5 JQMIGRATE: Migrate is installed, version 3.4.1

To fix it, go to your wp-config file, and add this line to it:

define(‘CONCATENATE_SCRIPTS’, false);

Take a look at the screenshot: