Fatal error: PHP notice in file /www/htdocs/v080184/wbb3/wcf/lib/system/security/SecurityHandler.class.php (338): Array to string conversion

Information:

error message: PHP notice in file /www/htdocs/v080184/wbb3/wcf/lib/system/security/SecurityHandler.class.php (338): Array to string conversion
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: Tue, 14 May 2024 22:07:11 +0000
request: /wbb3/wbb/index.php?form=search&s=56b555b1cc32a2c3c220272502786db07536639c
referer:

Stacktrace:

#0 /www/htdocs/v080184/wbb3/wcf/lib/system/security/SecurityHandler.class.php(338): WCF::handleError(8, 'Array to string...', '/www/htdocs/v08...', 338, Array)
#1 /www/htdocs/v080184/wbb3/wcf/lib/system/security/SecurityHandler.class.php(274): SecurityHandler->generateJournal('flood')
#2 /www/htdocs/v080184/wbb3/wcf/lib/system/security/SecurityHandler.class.php(252): SecurityHandler->attackJournal('flood')
#3 /www/htdocs/v080184/wbb3/wcf/lib/system/security/plugins/blacklist/blacklist.class.php(53): SecurityHandler->accessDenied('flood', Array)
#4 /www/htdocs/v080184/wbb3/wcf/lib/system/security/plugins/blacklist/blacklist.class.php(21): Blacklist->handleList()
#5 /www/htdocs/v080184/wbb3/wcf/lib/system/security/SecurityHandler.class.php(188): Blacklist->execute(Object(SecurityHandler), 'blacklist')
#6 /www/htdocs/v080184/wbb3/wcf/lib/system/security/SecurityHandler.class.php(52): SecurityHandler->fireActions()
#7 /www/htdocs/v080184/wbb3/wcf/lib/system/event/listener/SecurityListener.class.php(34): SecurityHandler->systemCore()
#8 /www/htdocs/v080184/wbb3/wcf/lib/system/event/EventHandler.class.php(117): SecurityListener->execute(Object(SearchForm), 'SearchForm', 'readParameters')
#9 /www/htdocs/v080184/wbb3/wcf/lib/system/event/EventHandler.class.php(142): EventHandler::executeInheritedActions(Object(SearchForm), 'readParameters', 'SearchForm', 'readParameters@...')
#10 /www/htdocs/v080184/wbb3/wcf/lib/page/AbstractPage.class.php(44): EventHandler::fireAction(Object(SearchForm), 'readParameters')
#11 /www/htdocs/v080184/wbb3/wcf/lib/form/CaptchaForm.class.php(23): AbstractPage->readParameters()
#12 /www/htdocs/v080184/wbb3/wcf/lib/form/SearchForm.class.php(47): CaptchaForm->readParameters()
#13 /www/htdocs/v080184/wbb3/wcf/lib/page/AbstractPage.class.php(35): SearchForm->readParameters()
#14 /www/htdocs/v080184/wbb3/wcf/lib/util/RequestHandler.class.php(63): AbstractPage->__construct()
#15 /www/htdocs/v080184/wbb3/wcf/lib/util/RequestHandler.class.php(94): RequestHandler->__construct('search', Array, 'form')
#16 /www/htdocs/v080184/wbb3/wbb/index.php(8): RequestHandler::handle(Array)
#17 {main}