Fatal error: PHP error in file /www/htdocs/w00a13c1/Forum/lib/page/UserWantedPosterListPage.class.php (32): Non-static method UserWantedPosterData::countEntries() should not be called statically, assuming $this from incompatible context

Information:

error message: PHP error in file /www/htdocs/w00a13c1/Forum/lib/page/UserWantedPosterListPage.class.php (32): Non-static method UserWantedPosterData::countEntries() should not be called statically, assuming $this from incompatible context
error code: 0
file: /www/htdocs/w00a13c1/Forum/lib/system/WCF.class.php (255)
php version: 5.5.38-nmm3
wcf version: 1.0.11 pl 3 (Horizon)
date: Mon, 10 Dec 2018 12:58:41 +0000
request: /Forum/wbb3/index.php?page=UserWantedPosterList&s=4c32b1d059d9385e0a5b373a0b74bf2dcee73101
referer:

Stacktrace:

#0 /www/htdocs/w00a13c1/Forum/lib/page/UserWantedPosterListPage.class.php(32): WCF::handleError(2048, 'Non-static meth...', '/www/htdocs/w00...', 32, Array)
#1 /www/htdocs/w00a13c1/Forum/lib/page/MultipleLinkPage.class.php(79): UserWantedPosterListPage->countItems()
#2 /www/htdocs/w00a13c1/Forum/lib/page/MultipleLinkPage.class.php(67): MultipleLinkPage->calculateNumberOfPages()
#3 /www/htdocs/w00a13c1/Forum/lib/page/UserWantedPosterListPage.class.php(49): MultipleLinkPage->readData()
#4 /www/htdocs/w00a13c1/Forum/lib/page/AbstractPage.class.php(74): UserWantedPosterListPage->readData()
#5 /www/htdocs/w00a13c1/Forum/lib/page/UserWantedPosterListPage.class.php(75): AbstractPage->show()
#6 /www/htdocs/w00a13c1/Forum/lib/page/AbstractPage.class.php(36): UserWantedPosterListPage->show()
#7 /www/htdocs/w00a13c1/Forum/lib/page/UserWantedPosterListPage.class.php(23): AbstractPage->__construct()
#8 /www/htdocs/w00a13c1/Forum/lib/util/RequestHandler.class.php(63): UserWantedPosterListPage->__construct()
#9 /www/htdocs/w00a13c1/Forum/lib/util/RequestHandler.class.php(91): RequestHandler->__construct('UserWantedPoste...', Array, 'page')
#10 /www/htdocs/w00a13c1/Forum/wbb3/index.php(8): RequestHandler::handle(Array)
#11 {main}