Fatal error: PHP error in file /usr/www/users/spurer/lib/page/RGalleryImageWrapperPage.class.php (51): Non-static method RGallerySystem::prepInput() should not be called statically, assuming $this from incompatible context

Information:

error message: PHP error in file /usr/www/users/spurer/lib/page/RGalleryImageWrapperPage.class.php (51): Non-static method RGallerySystem::prepInput() should not be called statically, assuming $this from incompatible context
error code: 0
file: /usr/www/users/spurer/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 16:05:27 +0000
request: /index.php?page=RGalleryImageWrapper&itemID=7547&type=page&s=1708661ff25ee7216199e4d7dde21377f7e178ac
referer:

Stacktrace:

#0 /usr/www/users/spurer/lib/page/RGalleryImageWrapperPage.class.php(51): WCF::handleError(8192, 'Non-static meth...', '/usr/www/users/...', 51, Array)
#1 /usr/www/users/spurer/wcf/lib/page/AbstractPage.class.php(46): RGalleryImageWrapperPage->show()
#2 /usr/www/users/spurer/wcf/lib/util/RequestHandler.class.php(64): AbstractPage->__construct()
#3 /usr/www/users/spurer/wcf/lib/util/RequestHandler.class.php(92): RequestHandler->__construct('RGalleryImageWr...', Array, 'page')
#4 /usr/www/users/spurer/index.php(8): RequestHandler::handle(Array)
#5 {main}