On one of the test sites we are trying we did a successful upgrade, this was via the auto system. However we now only get a error page message when we goto the site. This is the message Error Error Type: wcf\system\exception\SystemException Error Message: application identified by package id '0' is unknown File: */lib/system/WCF.class.php (549) Stack Trace: #0 */lib/system/WCF.class.php (495): wcf\system\WCF->loadApplication(wcf\data\application\Application) #1 */lib/system/WCF.class.php (155): wcf\system\WCF->initApplications() #2 */global.php (13): wcf\system\WCF->__construct() #3 */index.php (8): require_once('*/global.php') It mentions going into admin panel, however the admin panel only shows a search box, nothing else. as seen in this screen shot. The front page looks like this after the upgrade. Any ideas how to sort it out? Out of all the schools we are trying to get, to take woltlab on, this site is the one i have had the most trouble convincing to swap to woltlab. And until this happened it has behaved the best of all the sites.