Abantecart error installation error, database error(10000) in php

[Mininge]

Following error has occurred during installation: OK:

Name    Info
10000::database error

Error: Could not load database file DB_DRIVER! in /home/lcdmasters/public_html/tvpartsontario1/core/lib/db.php on line 49

[Basara]

Could you please provide the following details to help us troubleshoot the issue?

1. What version of AbanteCart are you using?
2. What version of PHP is installed on your server?
3. Is your server running Nginx or Apache?
4. Are you installing this on a localhost or a hosting service?