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

[Oxy]

Did you try to upload the missing files ?

How to upload files with FTP

The best and most reliable way to upload files is to use FTP. To upload files with FTP, you will need to following: Your FTP username Your FTP password The FTP hostname An FTP client You can find your FTP username, password and hostname in the client area under the FTP Details section. The FTP password is the same as your hosting account and control panel password, which is different from the password for the client area. If you like videos better then text guides, you can find one at the bot…

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