The .htaccess file has been deleted and a 404 error message appears

Did you try to upload the missing files ?

Did you install WordPress via our Softaculous app installer (control panel) or manually?

I assume there is something wrong with your installation because many folders are missing

wp-admin doesn’t work either

if it’s a new website and you haven’t edited much - try reinstalling WP

but before that be sure to purge all on CF and test