Fatal error: PHP warning in file /www/htdocs/v080184/wbb3/wcf/lib/system/security/SecurityHandler.class.php (402): preg_match(): Delimiter must not be alphanumeric or backslash

Information:

error message: PHP warning in file /www/htdocs/v080184/wbb3/wcf/lib/system/security/SecurityHandler.class.php (402): preg_match(): Delimiter must not be alphanumeric or backslash
error code: 0
file: /www/htdocs/v080184/wbb3/wcf/lib/system/WCF.class.php (255)
php version: 5.6.40-nmm9
wcf version: 1.0.11 pl 1 (Horizon)
date: Sat, 09 Nov 2024 20:23:00 +0000
request: /wbb3/wbb/index.php?s=0bbc6926247f276ac0676702226e0f1b2de0fc40
referer: http://community-of-darkness.com/wbb3/wbb/index.php?action=BoardMarkAllAsRead&s=e83e6c86ae24f8ac78cd3aaeecdcfcbb9beca65d

Stacktrace:

#0 [internal function]: WCF::handleError(2, 'preg_match(): D...', '/www/htdocs/v08...', 402, Array)
#1 /www/htdocs/v080184/wbb3/wcf/lib/system/security/SecurityHandler.class.php(402): preg_match('community-of-da...', 'http://communit...')
#2 /www/htdocs/v080184/wbb3/wcf/lib/system/security/plugins/datatransfer/datatransfer.class.php(17): SecurityHandler->checkReferer()
#3 /www/htdocs/v080184/wbb3/wcf/lib/system/security/SecurityHandler.class.php(188): Datatransfer->execute(Object(SecurityHandler), 'datatransfer')
#4 /www/htdocs/v080184/wbb3/wcf/lib/system/security/SecurityHandler.class.php(67): SecurityHandler->fireActions()
#5 /www/htdocs/v080184/wbb3/wcf/lib/system/event/listener/SecurityListener.class.php(35): SecurityHandler->extendedSystem()
#6 /www/htdocs/v080184/wbb3/wcf/lib/system/event/EventHandler.class.php(117): SecurityListener->execute(Object(IndexPage), 'IndexPage', 'readParameters')
#7 /www/htdocs/v080184/wbb3/wcf/lib/system/event/EventHandler.class.php(142): EventHandler::executeInheritedActions(Object(IndexPage), 'readParameters', 'IndexPage', 'readParameters@...')
#8 /www/htdocs/v080184/wbb3/wcf/lib/page/AbstractPage.class.php(44): EventHandler::fireAction(Object(IndexPage), 'readParameters')
#9 /www/htdocs/v080184/wbb3/wcf/lib/page/AbstractPage.class.php(35): AbstractPage->readParameters()
#10 /www/htdocs/v080184/wbb3/wcf/lib/util/RequestHandler.class.php(63): AbstractPage->__construct()
#11 /www/htdocs/v080184/wbb3/wcf/lib/util/RequestHandler.class.php(100): RequestHandler->__construct('Index', Array, 'page')
#12 /www/htdocs/v080184/wbb3/wbb/index.php(8): RequestHandler::handle(Array)
#13 {main}