Fatal error: PHP error in file /usr/www/users/spurer/lib/page/RGalleryPage.class.php (213): Non-static method RGallerySystem::getCurrentCategorie() should not be called statically, assuming $this from incompatible context

Information:

error message: PHP error in file /usr/www/users/spurer/lib/page/RGalleryPage.class.php (213): Non-static method RGallerySystem::getCurrentCategorie() 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 16:01:41 +0000
request: /index.php?page=RGallery&rGalleryCat=none&reset_tag=1&s=82a73013f16d5e7bc6874433158311d0251c03d9&l=8&s=d30f436d2e785862d5320ab5182dd3ad66922f5d&l=6&s=27d3573aafee071073a871c9cd47a4c535cf0f7a
referer: http://s1gf.de/index.php?page=RGallery&rGalleryCat=none&reset_tag=1&s=82a73013f16d5e7bc6874433158311d0251c03d9&l=8&s=d30f436d2e785862d5320ab5182dd3ad66922f5d&l=6&s=27d3573aafee071073a871c9cd47a4c535cf0f7a

Stacktrace:

#0 /usr/www/users/spurer/lib/page/RGalleryPage.class.php(213): WCF::handleError(8192, 'Non-static meth...', '/usr/www/users/...', 213, Array)
#1 /usr/www/users/spurer/wcf/lib/page/AbstractPage.class.php(46): RGalleryPage->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('RGallery', Array, 'page')
#4 /usr/www/users/spurer/index.php(8): RequestHandler::handle(Array)
#5 {main}