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 20:22:33 +0000
request: /wbb3/wbb/index.php?form=Search&searchID=981912&s=bb0bd066ad3632060c8dd58031df3b922db889c7
referer: http://community-of-darkness.com/wbb3/wbb/index.php?action=unreplied&form=Search&s=27174738656c8245170f135d111f60af7246f6bb

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(SearchForm), 'SearchForm', 'readParameters')
#7 /www/htdocs/v080184/wbb3/wcf/lib/system/event/EventHandler.class.php(142): EventHandler::executeInheritedActions(Object(SearchForm), 'readParameters', 'SearchForm', 'readParameters@...')
#8 /www/htdocs/v080184/wbb3/wcf/lib/page/AbstractPage.class.php(44): EventHandler::fireAction(Object(SearchForm), 'readParameters')
#9 /www/htdocs/v080184/wbb3/wcf/lib/form/CaptchaForm.class.php(23): AbstractPage->readParameters()
#10 /www/htdocs/v080184/wbb3/wcf/lib/form/SearchForm.class.php(47): CaptchaForm->readParameters()
#11 /www/htdocs/v080184/wbb3/wcf/lib/page/AbstractPage.class.php(35): SearchForm->readParameters()
#12 /www/htdocs/v080184/wbb3/wcf/lib/util/RequestHandler.class.php(63): AbstractPage->__construct()
#13 /www/htdocs/v080184/wbb3/wcf/lib/util/RequestHandler.class.php(94): RequestHandler->__construct('Search', Array, 'form')
#14 /www/htdocs/v080184/wbb3/wbb/index.php(8): RequestHandler::handle(Array)
#15 {main}