Fatal error: PHP notice in file /var/www/vhosts/s-andi.de/spam-forum.s-andi.de/wcf/lib/system/auth/UserAuthDefault.class.php (56): Use of undefined constant COOKIE_PREFIX - assumed 'COOKIE_PREFIX'

Information:

error message: PHP notice in file /var/www/vhosts/s-andi.de/spam-forum.s-andi.de/wcf/lib/system/auth/UserAuthDefault.class.php (56): Use of undefined constant COOKIE_PREFIX - assumed 'COOKIE_PREFIX'
error code: 0
file: /var/www/vhosts/s-andi.de/spam-forum.s-andi.de/wcf/lib/system/WCF.class.php (255)
php version: 5.3.29
wcf version: 1.0.10 (Horizon)
date: Fri, 29 Sep 2023 10:39:43 +0000
request: /index.php?page=Thread&threadID=145689&action=firstNew&s=dca24e72ac3b21c2a3d18ea6069d0e0349a12f55
referer:

Stacktrace:

#0 /var/www/vhosts/s-andi.de/spam-forum.s-andi.de/wcf/lib/system/auth/UserAuthDefault.class.php(56): WCF::handleError(8, 'Use of undefine...', '/var/www/vhosts...', 56, Array)
#1 /var/www/vhosts/s-andi.de/spam-forum.s-andi.de/wcf/lib/system/session/CookieSessionFactory.class.php(34): UserAuthDefault->loginAutomatically(true, 'WBBUserSession')
#2 /var/www/vhosts/s-andi.de/spam-forum.s-andi.de/wcf/lib/system/session/SessionFactory.class.php(71): CookieSessionFactory->create()
#3 /var/www/vhosts/s-andi.de/spam-forum.s-andi.de/lib/system/WBBCore.class.php(170): SessionFactory->get()
#4 /var/www/vhosts/s-andi.de/spam-forum.s-andi.de/wcf/lib/system/WCF.class.php(91): WBBCore->initSession()
#5 /var/www/vhosts/s-andi.de/spam-forum.s-andi.de/global.php(18): WCF->__construct()
#6 /var/www/vhosts/s-andi.de/spam-forum.s-andi.de/index.php(7): require_once('/var/www/vhosts...')
#7 {main}