Fatal Error im Zusammenhang mit einem anderen Plugin

Fri, 21 Feb 2014 14:11:47 +0000
Message: PHP notice in file /www/htdocs/w011913e/***wcf/lib/system/event/listener/UzbotThreadListener.class.php (45): Trying to get property of non-object
File: /www/htdocs/w011913e/***/wcf/lib/system/WCF.class.php (303)
PHP version: 5.4.24-nmm1
WCF version: 2.0.2 pl 1 (Maelstrom)
Request URI: /index.php/ThreadAdd/76/
Referrer: http://www.***.de/index.php/ThreadAdd/76/
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:27.0) Gecko/20100101 Firefox/27.0
Information: ""
Stacktrace: 
  #0 /www/htdocs/w011913e/***/wcf/lib/system/event/listener/UzbotThreadListener.class.php(45): wcf\system\WCF::handleError(8, 'Trying to get p...', '/www/htdocs/w01...', 45, Array)
  #1 /www/htdocs/w011913e/***/wcf/lib/system/event/EventHandler.class.php(189): wcf\system\event\listener\UzbotThreadListener->execute(Object(wbb\data\thread\ThreadAction), 'wbb\data\thread...', 'finalizeAction')
  #2 /www/htdocs/w011913e/***/wcf/lib/data/AbstractDatabaseObjectAction.class.php(190): wcf\system\event\EventHandler->fireAction(Object(wbb\data\thread\ThreadAction), 'finalizeAction')
  #3 /www/htdocs/w011913e/***/lib/form/ThreadAddForm.class.php(364): wcf\data\AbstractDatabaseObjectAction->executeAction()
  #4 /www/htdocs/w011913e/***/wcf/lib/form/AbstractForm.class.php(63): wbb\form\ThreadAddForm->save()
  #5 /www/htdocs/w011913e/***/wcf/lib/form/AbstractForm.class.php(114): wcf\form\AbstractForm->submit()
  #6 /www/htdocs/w011913e/***/wcf/lib/form/MessageForm.class.php(334): wcf\form\AbstractForm->readData()
  #7 /www/htdocs/w011913e/***/lib/form/ThreadAddForm.class.php(416): wcf\form\MessageForm->readData()
  #8 /www/htdocs/w011913e/***/wcf/lib/page/AbstractPage.class.php(179): wbb\form\ThreadAddForm->readData()
  #9 /www/htdocs/w011913e/***/wcf/lib/page/AbstractPage.class.php(86): wcf\page\AbstractPage->show()
  #10 /www/htdocs/w011913e/***/wcf/lib/system/request/Request.class.php(58): wcf\page\AbstractPage->__run()
  #11 /www/htdocs/w011913e/***/wcf/lib/system/request/RequestHandler.class.php(107): wcf\system\request\Request->execute()
  #12 /www/htdocs/w011913e/***/index.php(10): wcf\system\request\RequestHandler->handle('wbb')
  #13 {main}