Blog entry by Yaakub Idris
This is caused by one of 2 major things (from my experience):
- The system is unable to connect to the database.
- The system is unable to load the config info from the database.
Make sure your database connection info in the osTicket config file is correct.
Make sure the config database table has not become damaged or corrupted.
By the way, location configuration file for both issues located at ../include/ost-config.php
Thanks to http://osticket.com