In my WordPress admin while clicking add new page the style breaks on loading and then it appears.
Herewith attached link for screenshot https://prnt.sc/nazit8
Also I have tried these below 2 steps
Open up your WP-config.php file and insert the code
define( ‘CONCATENATE_SCRIPTS’, false );
define( ‘SCRIPT_DEBUG’, true );
and in wp-admin/load-styles.php
error_reporting( E_ALL | E_STRICT );