What do you see when you visit https://borgserver/borgserver/ without the /wp-admin? If WordPress isn’t installed (which it doesn’t sound like it is yet), it should walk you through the installation process.
This either means that the username and password information in your wp-config.php file is incorrect or we can’t contact the database server at localhost. This could mean your host’s database server is down.
The wp-config.php file in question should be at https://borgserver/borgserver/wp-config.php. It doesn’t exist as standard, as it should be created prior to installation. The install process should be able to walk you through this.
The wp-config.php is what holds all the information to connect to your MySQL database (which is where all the content for your blog is held).
I would try that as a first port of call. Hope it helps!