Admin Disappeared

Are you referring to the WordPress admin dashboard?

What happens if you try to access that login page?

And if you login…?

Using Phpmyadmin (or another MySQL management tool), first backup your database. Then navigate to your wp_usermeta table and locate the meta_key called “wp_capabilities” for your user_id. Change the meta-value for this record to:

a:1:{s:13:"administrator";s:1:"1";}