There is a problem with your database configuration file. This might happen if the file \admin\engine.inc.php was modified manually.
To fix this please do the following:
Open file \admin\engine.inc.php
Check if this file contains the following lines:
If these lines are missing, then you should add them, replacing YOUR_DATABASE_HOST, YOUR_DATABASE_USERNAME,
YOUR_DATABASE_PASSWORD and YOUR_DATABASE_NAME with the actual credentials of your SupportTrio database.