Fatal error: PHP warning in file /home/woltlab/demo/forum2/wcf/lib/system/event/EventHandler.class.php (73): get_class() expects parameter 1 to be object, string given

Information:

error message: PHP warning in file /home/woltlab/demo/forum2/wcf/lib/system/event/EventHandler.class.php (73): get_class() expects parameter 1 to be object, string given
error code: 0
file: /home/woltlab/demo/forum2/wcf/lib/system/WCF.class.php (255)
php version: 5.4.45
wcf version: 1.0.10 (Horizon)
date: Tue, 01 Jul 2025 00:18:36 +0000
request: /forum2/index.php?page=Help&item=general&s=e3283ded0e43f130badf255dabc6080d338372d6&l=2&s=0a74f2e29eb7e468e74699d491a646d2d6f92619&l=1&s=5b7d151f642c3614424d0a200288524dadbb3a92&l=1&s=ea3a1619b9e0b215a43fff1ef70ee814a9d18722
referer:

Stacktrace:

#0 [internal function]: WCF::handleError(2, 'get_class() exp...', '/home/woltlab/d...', 73, Array)
#1 /home/woltlab/demo/forum2/wcf/lib/system/event/EventHandler.class.php(73): get_class('UserAuth')
#2 /home/woltlab/demo/forum2/wcf/lib/system/event/EventHandler.class.php(142): EventHandler::executeInheritedActions('UserAuth', 'loadInstance', 'UserAuth', 'loadInstance@Us...')
#3 /home/woltlab/demo/forum2/wcf/lib/system/auth/UserAuth.class.php(28): EventHandler::fireAction('UserAuth', 'loadInstance')
#4 /home/woltlab/demo/forum2/wcf/lib/system/session/CookieSessionFactory.class.php(34): UserAuth::getInstance()
#5 /home/woltlab/demo/forum2/wcf/lib/system/session/SessionFactory.class.php(71): CookieSessionFactory->create()
#6 /home/woltlab/demo/forum2/lib/system/WBBCore.class.php(201): SessionFactory->get()
#7 /home/woltlab/demo/forum2/wcf/lib/system/WCF.class.php(91): WBBCore->initSession()
#8 /home/woltlab/demo/forum2/global.php(18): WCF->__construct()
#9 /home/woltlab/demo/forum2/index.php(7): require_once('/home/woltlab/d...')
#10 {main}