My website WordPress backend is not loading with CSS….the frontend is working fine but once i try login to my wordpress admin the page load without any style .. I have reinstalled WordPress core file many time and i have try and added these (define( ‘CONCATENATE_SCRIPTS’, false );
define( ‘SCRIPT_DEBUG’, true ); in wp-config.php but problem still not fixed

the error in chrome consul is showing :

Refused to apply style from ‘https://www.csm.school/wp-admin/load-styles.php?c=1&dir=ltr&load%5Bchunk_0%5D=dashicons,admin-bar,wp-pointer,site-health,common,forms,admin-menu,dashboard,list-tables,edit,revisions,media,themes,about,nav-m&load%5Bchunk_1%5D=enus,widgets,site-icon,l10n,buttons,wp-auth-check&ver=5.4.2’ because its MIME type (‘text/html’) is not a supported stylesheet MIME type, and strict MIME checking is enabled.