Install(?) error: Unable to access site after install

[Catfish]

Hi again! Back to being able to squeeze more time into this project.

I removed the install in the sub-directory and installed it at top level. The install went along without error and actually got the site to respond but now I get a server error. To my untutored eye the dB stuff appears to match up correctly but, obviously, something's gone wonky.

Here's the config.php info again. In the meantime I'm going to dig into old topics and see if there is an existing answer. Thank you~!

<?php
//Mysidia Adoptables Site Configuration File

define('DBHOST', 'localhost');             //DB Hostname
define('DBUSER', 'battledo_adopter');             //DB Username
define('DBPASS', '**********');             //DB Password
define('DBNAME', 'battledo_adopt');             //Your database name
define('DOMAIN', 'battledoll.com');             //Your domain name (No http, www or . )
define('SCRIPTPATH', '');     //The folder you installed this script in
define('PREFIX', 'adopts_');
?>

Here's the info from phpMyAdmin - it looks like it uses localhost...?