Still can't get enough?

Alright, here comes the exception trace. Have fun with it! Hint: Set the typoscript property plugin.tx_typo3forum.settings.debug to 0 to disable the display of this exception trace.

#0 [internal function]: Mittwald\Typo3Forum\Controller\UserController->listTopicsAction(NULL)
#1 /html/production.typo3.net/shared/TYPO3.CMS/typo3/sysext/extbase/Classes/Mvc/Controller/ActionController.php(287): call_user_func_array(Array, Array)
#2 /html/production.typo3.net/releases/20150903211226/typo3conf/ext/typo3_forum/Classes/Controller/AbstractController.php(123): TYPO3\CMS\Extbase\Mvc\Controller\ActionController->callActionMethod()
#3 /html/production.typo3.net/shared/TYPO3.CMS/typo3/sysext/extbase/Classes/Mvc/Controller/ActionController.php(158): Mittwald\Typo3Forum\Controller\AbstractController->callActionMethod()
#4 /html/production.typo3.net/shared/TYPO3.CMS/typo3/sysext/extbase/Classes/Mvc/Dispatcher.php(69): TYPO3\CMS\Extbase\Mvc\Controller\ActionController->processRequest(Object(TYPO3\CMS\Extbase\Mvc\Web\Request), Object(TYPO3\CMS\Extbase\Mvc\Web\Response))
#5 /html/production.typo3.net/shared/TYPO3.CMS/typo3/sysext/extbase/Classes/Mvc/Web/FrontendRequestHandler.php(56): TYPO3\CMS\Extbase\Mvc\Dispatcher->dispatch(Object(TYPO3\CMS\Extbase\Mvc\Web\Request), Object(TYPO3\CMS\Extbase\Mvc\Web\Response))
#6 /html/production.typo3.net/shared/TYPO3.CMS/typo3/sysext/extbase/Classes/Core/Bootstrap.php(195): TYPO3\CMS\Extbase\Mvc\Web\FrontendRequestHandler->handleRequest()
#7 /html/production.typo3.net/shared/TYPO3.CMS/typo3/sysext/extbase/Classes/Core/Bootstrap.php(184): TYPO3\CMS\Extbase\Core\Bootstrap->handleRequest()
#8 [internal function]: TYPO3\CMS\Extbase\Core\Bootstrap->run('', Array)
#9 /html/production.typo3.net/shared/TYPO3.CMS/typo3/sysext/frontend/Classes/ContentObject/ContentObjectRenderer.php(6665): call_user_func_array(Array, Array)
#10 /html/production.typo3.net/shared/TYPO3.CMS/typo3/sysext/frontend/Classes/ContentObject/UserContentObject.php(41): TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer->callUserFunction('TYPO3\\CMS\\Extba...', Array, '')
#11 /html/production.typo3.net/shared/TYPO3.CMS/typo3/sysext/frontend/Classes/ContentObject/ContentObjectRenderer.php(862): TYPO3\CMS\Frontend\ContentObject\UserContentObject->render(Array)
#12 /html/production.typo3.net/shared/TYPO3.CMS/typo3/sysext/frontend/Classes/Controller/TypoScriptFrontendController.php(3729): TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer->USER(Array)
#13 /html/production.typo3.net/shared/TYPO3.CMS/typo3/sysext/frontend/Classes/Controller/TypoScriptFrontendController.php(3677): TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController->INTincScript_process(Array)
#14 /html/production.typo3.net/shared/TYPO3.CMS/typo3/sysext/frontend/Classes/Controller/TypoScriptFrontendController.php(3644): TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController->recursivelyReplaceIntPlaceholdersInContent()
#15 /html/production.typo3.net/shared/TYPO3.CMS/typo3/sysext/cms/tslib/index_ts.php(232): TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController->INTincScript()
#16 /html/production.typo3.net/shared/TYPO3.CMS/index.php(28): require('/html/productio...')
#17 {main}