Thread:Project:Support desk/ActivUserCount/reply

Can you check if $wgReadOnly is enabled in your configuration (LocalSettings.php)? If so, the page will not be updated automatically (there shouldn't be no change, because nobody can edit). If you don't remove the setting, you can update all special pages (including ActiveUsers) with the maintenance script Manual:UpdateSpecialPages.php (I'm not sure, if this is possible, if the wiki is in readonly mode).