Fatal error: PHP notice in file /srv/www/htdocs/forumprofi.de/backend/files/software/WBBLite/html/wcf/lib/system/event/listener/WioIndexPageListener.class.php (25): Use of undefined constant WIO_ACTIVE - assumed 'WIO_ACTIVE'

Information:

error message: PHP notice in file /srv/www/htdocs/forumprofi.de/backend/files/software/WBBLite/html/wcf/lib/system/event/listener/WioIndexPageListener.class.php (25): Use of undefined constant WIO_ACTIVE - assumed 'WIO_ACTIVE'
error code: 0
file: /srv/www/htdocs/forumprofi.de/backend/files/software/WBBLite/html/wcf/lib/system/WCF.class.php (739)
php version: 5.2.17
wcf version: 1.0.11 pl 3 (Horizon)
date: Wed, 14 Nov 2018 09:19:45 +0000
request: /index.php?page=Index&s=0ac9e87752509d4954c9b6792583a3a58098b352
referer:

Stacktrace:

#0 /srv/www/htdocs/forumprofi.de/backend/files/software/WBBLite/html/wcf/lib/system/event/listener/WioIndexPageListener.class.php(25): WCF::handleError(8, 'Use of undefine...', '/srv/www/htdocs...', 25, Array)
#1 /srv/www/htdocs/forumprofi.de/backend/files/software/WBBLite/html/wcf/lib/system/event/EventHandler.class.php(195): WioIndexPageListener->execute(Object(IndexPage), 'IndexPage', 'readData')
#2 /srv/www/htdocs/forumprofi.de/backend/files/software/WBBLite/html/wcf/lib/page/AbstractPage.class.php(55): EventHandler::fireAction(Object(IndexPage), 'readData')
#3 /srv/www/htdocs/forumprofi.de/backend/files/software/WBBLite/html/wcf/lib/page/AbstractPage.class.php(74): AbstractPage->readData()
#4 /srv/www/htdocs/forumprofi.de/backend/files/software/WBBLite/html/wcf/lib/page/AbstractPage.class.php(36): AbstractPage->show()
#5 /srv/www/htdocs/forumprofi.de/backend/files/software/WBBLite/html/wcf/lib/util/RequestHandler.class.php(63): AbstractPage->__construct()
#6 /srv/www/htdocs/forumprofi.de/backend/files/software/WBBLite/html/wcf/lib/util/RequestHandler.class.php(91): RequestHandler->__construct('Index', Array, 'page')
#7 /srv/www/htdocs/forumprofi.de/backend/files/software/WBBLite/html/index.php(8): RequestHandler::handle(Array)
#8 /srv/www/htdocs/forumprofi.de/backend/files/software/WBBLite/installations/main2/npxptc-4s6e-538/index.php(5): require_once('/srv/www/htdocs...')
#9 {main}