Fatal error: PHP warning in file /var/www/vhosts/h211991.web18.alfahosting-server.de/html/forum/lib/data/boxes/PortalBox.class.php (246): Invalid argument supplied for foreach()

Information:

error message: PHP warning in file /var/www/vhosts/h211991.web18.alfahosting-server.de/html/forum/lib/data/boxes/PortalBox.class.php (246): Invalid argument supplied for foreach()
error code: 0
file: /var/www/vhosts/h211991.web18.alfahosting-server.de/html/forum/wcf/lib/system/WCF.class.php (281)
php version: 5.6.40
wcf version: 1.1.10 pl 2 (Tempest)
date: Thu, 18 Apr 2024 16:53:52 +0000
request: /index.php?page=Portal&s=f3481f880a9764dfed8b19c6b1b945fe9719068b
referer:

Stacktrace:

#0 /var/www/vhosts/h211991.web18.alfahosting-server.de/html/forum/lib/data/boxes/PortalBox.class.php(246): WCF::handleError(2, 'Invalid argumen...', '/var/www/vhosts...', 246, Array)
#1 /var/www/vhosts/h211991.web18.alfahosting-server.de/html/forum/lib/system/portalbox/PortalBoxFactory.class.php(56): PortalBox::loadBoxes()
#2 /var/www/vhosts/h211991.web18.alfahosting-server.de/html/forum/lib/system/portalbox/PortalBoxFactory.class.php(42): PortalBoxFactory->selectBoxes(true, false, false)
#3 /var/www/vhosts/h211991.web18.alfahosting-server.de/html/forum/lib/page/PortalPage.class.php(120): PortalBoxFactory->__construct(true, false, true, true, true)
#4 /var/www/vhosts/h211991.web18.alfahosting-server.de/html/forum/lib/page/PortalPage.class.php(105): PortalPage::getPortalBoxes()
#5 /var/www/vhosts/h211991.web18.alfahosting-server.de/html/forum/wcf/lib/page/AbstractPage.class.php(90): PortalPage->readData()
#6 /var/www/vhosts/h211991.web18.alfahosting-server.de/html/forum/lib/page/PortalPage.class.php(147): AbstractPage->show()
#7 /var/www/vhosts/h211991.web18.alfahosting-server.de/html/forum/wcf/lib/page/AbstractPage.class.php(46): PortalPage->show()
#8 /var/www/vhosts/h211991.web18.alfahosting-server.de/html/forum/wcf/lib/util/RequestHandler.class.php(64): AbstractPage->__construct()
#9 /var/www/vhosts/h211991.web18.alfahosting-server.de/html/forum/wcf/lib/util/RequestHandler.class.php(92): RequestHandler->__construct('Portal', Array, 'page')
#10 /var/www/vhosts/h211991.web18.alfahosting-server.de/html/forum/index.php(8): RequestHandler::handle(Array)
#11 {main}