Fatal error: PHP notice in file /www/htdocs/v080184/wbb3/wcf/lib/system/session/CookieSession.class.php (63): Use of undefined constant COOKIE_PREFIX - assumed 'COOKIE_PREFIX'

Information:

error message: PHP notice in file /www/htdocs/v080184/wbb3/wcf/lib/system/session/CookieSession.class.php (63): Use of undefined constant COOKIE_PREFIX - assumed 'COOKIE_PREFIX'
error code: 0
file: /www/htdocs/v080184/wbb3/wcf/lib/system/WCF.class.php (255)
php version: 5.6.40-nmm8
wcf version: 1.0.11 pl 1 (Horizon)
date: Thu, 23 May 2024 13:37:16 +0000
request: /wbb3/wbb/index.php?page=Thread&postID=55723&s=bd441bc80643ddd856b7c6a3dd56de79bceaa757
referer: http://www.community-of-darkness.com/wbb3/wbb/index.php?action=lastPost&page=Thread&s=8449cc00692a26e5de5a572630f7013fd86a7dd9&threadID=2192

Stacktrace:

#0 /www/htdocs/v080184/wbb3/wcf/lib/system/session/CookieSession.class.php(63): WCF::handleError(8, 'Use of undefine...', '/www/htdocs/v08...', 63, Array)
#1 /www/htdocs/v080184/wbb3/wcf/lib/system/session/CookieSession.class.php(41): CookieSession->handleCookie()
#2 /www/htdocs/v080184/wbb3/wcf/lib/system/session/Session.class.php(95): CookieSession->defineConstants()
#3 /www/htdocs/v080184/wbb3/wcf/lib/system/session/SessionFactory.class.php(96): Session->__construct('bd441bc80643ddd...')
#4 /www/htdocs/v080184/wbb3/wcf/lib/system/session/SessionFactory.class.php(66): SessionFactory->getExistingSession('bd441bc80643ddd...')
#5 /www/htdocs/v080184/wbb3/wbb/lib/system/WBBCore.class.php(201): SessionFactory->get()
#6 /www/htdocs/v080184/wbb3/wcf/lib/system/WCF.class.php(91): WBBCore->initSession()
#7 /www/htdocs/v080184/wbb3/wbb/global.php(18): WCF->__construct()
#8 /www/htdocs/v080184/wbb3/wbb/index.php(7): require_once('/www/htdocs/v08...')
#9 {main}