There was a hacker here
Greetings from d4rkw3bh4ck3r :) d4rkw3bh4ck3r[at]protonmail.com
Hello, admin. I took a backup of your site. No need to reinstall Wordpress.
To save your site, please contact me. I also know the security vulnerabilities on the site. I can tell them to you.
My e-mail address: firstname.lastname@example.org Don't be afraid to contact me :)