Fatal error: PHP error in file /usr/www/users/krised/forum/lib/data/boxes/NewsReader/simplepie.inc (8689): Non-static method SimplePie_Misc::percent_encoding_normalization() should not be called statically

Information:

error message: PHP error in file /usr/www/users/krised/forum/lib/data/boxes/NewsReader/simplepie.inc (8689): Non-static method SimplePie_Misc::percent_encoding_normalization() should not be called statically
error code: 0
file: /usr/www/users/krised/forum/wcf/lib/system/WCF.class.php (281)
php version: 5.6.40
wcf version: 1.1.8 (Tempest)
date: Thu, 18 Apr 2024 15:36:38 +0000
request: /forum/index.php?page=Portal&s=8115610199e83aea4a43a980cfe45500f2645d89
referer:

Stacktrace:

#0 [internal function]: WCF::handleError(2048, 'Non-static meth...', '/usr/www/users/...', 8689, Array)
#1 /usr/www/users/krised/forum/lib/data/boxes/NewsReader/simplepie.inc(8689): preg_replace_callback('/%([0-9A-Fa-f]{...', Array, 'http://www.fris...')
#2 /usr/www/users/krised/forum/lib/data/boxes/NewsReader/simplepie.inc(8610): SimplePie_Misc->normalize_url('http://www.fris...')
#3 /usr/www/users/krised/forum/lib/data/boxes/NewsReader/simplepie.inc(809): SimplePie_Misc->fix_protocol('http://www.fris...', 1)
#4 /usr/www/users/krised/forum/lib/data/boxes/NewsReaderBox.class.php(124): SimplePie->set_feed_url('http://www.fris...')
#5 /usr/www/users/krised/forum/lib/system/portalbox/PortalBoxFactory.class.php(105): NewsReaderBox->readData()
#6 /usr/www/users/krised/forum/lib/system/portalbox/PortalBoxFactory.class.php(43): PortalBoxFactory->initializeBoxes()
#7 /usr/www/users/krised/forum/lib/page/PortalPage.class.php(156): PortalBoxFactory->__construct(true, false, true, true, true)
#8 /usr/www/users/krised/forum/lib/page/PortalPage.class.php(141): PortalPage::getPortalBoxes()
#9 /usr/www/users/krised/forum/wcf/lib/page/AbstractPage.class.php(90): PortalPage->readData()
#10 /usr/www/users/krised/forum/wcf/lib/page/AbstractPage.class.php(46): AbstractPage->show()
#11 /usr/www/users/krised/forum/lib/page/PortalPage.class.php(97): AbstractPage->__construct()
#12 /usr/www/users/krised/forum/wcf/lib/util/RequestHandler.class.php(64): PortalPage->__construct()
#13 /usr/www/users/krised/forum/wcf/lib/util/RequestHandler.class.php(92): RequestHandler->__construct('Portal', Array, 'page')
#14 /usr/www/users/krised/forum/index.php(8): RequestHandler::handle(Array)
#15 {main}