Fatal error: PHP notice in file /is/htdocs/wp1132509_S572PKJP7A/www/forum/wbb2/wcf/lib/system/security/SecurityHandler.class.php (342): Array to string conversion

Information:

error message: PHP notice in file /is/htdocs/wp1132509_S572PKJP7A/www/forum/wbb2/wcf/lib/system/security/SecurityHandler.class.php (342): Array to string conversion
error code: 0
file: /is/htdocs/wp1132509_S572PKJP7A/www/forum/wbb2/wcf/lib/system/WCF.class.php (255)
php version: 5.6.31-he.0
wcf version: 1.0.11 pl 3 (Horizon)
date: Thu, 21 Sep 2017 01:37:55 +0000
request: /index.php?page=Thread&postID=33118&s=773b4f4d2b7eb7ece2a7b8bf603db4baad94438c
referer:

Stacktrace:

#0 /is/htdocs/wp1132509_S572PKJP7A/www/forum/wbb2/wcf/lib/system/security/SecurityHandler.class.php(342): WCF::handleError(8, 'Array to string...', '/is/htdocs/wp11...', 342, Array)
#1 /is/htdocs/wp1132509_S572PKJP7A/www/forum/wbb2/wcf/lib/system/security/SecurityHandler.class.php(278): SecurityHandler->generateJournal('flood')
#2 /is/htdocs/wp1132509_S572PKJP7A/www/forum/wbb2/wcf/lib/system/security/SecurityHandler.class.php(256): SecurityHandler->attackJournal('flood')
#3 /is/htdocs/wp1132509_S572PKJP7A/www/forum/wbb2/wcf/lib/system/security/plugins/floodcontrol/floodcontrol.class.php(133): SecurityHandler->accessDenied('flood', Array)
#4 /is/htdocs/wp1132509_S572PKJP7A/www/forum/wbb2/wcf/lib/system/security/plugins/floodcontrol/floodcontrol.class.php(50): Floodcontrol->accessDenied('30')
#5 /is/htdocs/wp1132509_S572PKJP7A/www/forum/wbb2/wcf/lib/system/security/plugins/floodcontrol/floodcontrol.class.php(41): Floodcontrol->calculateFlood('30')
#6 /is/htdocs/wp1132509_S572PKJP7A/www/forum/wbb2/wcf/lib/system/security/SecurityHandler.class.php(192): Floodcontrol->execute(Object(SecurityHandler), 'floodcontrol')
#7 /is/htdocs/wp1132509_S572PKJP7A/www/forum/wbb2/wcf/lib/system/security/SecurityHandler.class.php(56): SecurityHandler->fireActions()
#8 /is/htdocs/wp1132509_S572PKJP7A/www/forum/wbb2/wcf/lib/system/event/listener/SecurityListener.class.php(34): SecurityHandler->systemCore()
#9 /is/htdocs/wp1132509_S572PKJP7A/www/forum/wbb2/wcf/lib/system/event/EventHandler.class.php(117): SecurityListener->execute(Object(SimpleReplyListener), 'SimpleReplyList...', 'readParameters')
#10 /is/htdocs/wp1132509_S572PKJP7A/www/forum/wbb2/wcf/lib/system/event/EventHandler.class.php(142): EventHandler::executeInheritedActions(Object(SimpleReplyListener), 'readParameters', 'SimpleReplyList...', 'readParameters@...')
#11 /is/htdocs/wp1132509_S572PKJP7A/www/forum/wbb2/wcf/lib/page/AbstractPage.class.php(44): EventHandler::fireAction(Object(SimpleReplyListener), 'readParameters')
#12 /is/htdocs/wp1132509_S572PKJP7A/www/forum/wbb2/wcf/lib/form/CaptchaForm.class.php(23): AbstractPage->readParameters()
#13 /is/htdocs/wp1132509_S572PKJP7A/www/forum/wbb2/wcf/lib/page/AbstractPage.class.php(35): CaptchaForm->readParameters()
#14 /is/htdocs/wp1132509_S572PKJP7A/www/forum/wbb2/wcf/lib/system/event/EventHandler.class.php(105): AbstractPage->__construct()
#15 /is/htdocs/wp1132509_S572PKJP7A/www/forum/wbb2/wcf/lib/system/event/EventHandler.class.php(142): EventHandler::executeInheritedActions(Object(ThreadPage), 'assignVariables', 'ThreadPage', 'assignVariables...')
#16 /is/htdocs/wp1132509_S572PKJP7A/www/forum/wbb2/wcf/lib/page/AbstractPage.class.php(63): EventHandler::fireAction(Object(ThreadPage), 'assignVariables')
#17 /is/htdocs/wp1132509_S572PKJP7A/www/forum/wbb2/wcf/lib/page/MultipleLinkPage.class.php(109): AbstractPage->assignVariables()
#18 /is/htdocs/wp1132509_S572PKJP7A/www/forum/wbb2/lib/page/ThreadPage.class.php(132): MultipleLinkPage->assignVariables()
#19 /is/htdocs/wp1132509_S572PKJP7A/www/forum/wbb2/wcf/lib/page/AbstractPage.class.php(77): ThreadPage->assignVariables()
#20 /is/htdocs/wp1132509_S572PKJP7A/www/forum/wbb2/wcf/lib/page/AbstractPage.class.php(36): AbstractPage->show()
#21 /is/htdocs/wp1132509_S572PKJP7A/www/forum/wbb2/wcf/lib/util/RequestHandler.class.php(63): AbstractPage->__construct()
#22 /is/htdocs/wp1132509_S572PKJP7A/www/forum/wbb2/wcf/lib/util/RequestHandler.class.php(91): RequestHandler->__construct('Thread', Array, 'page')
#23 /is/htdocs/wp1132509_S572PKJP7A/www/forum/wbb2/index.php(8): RequestHandler::handle(Array)
#24 {main}