Thread:Extension talk:DynamicSidebar/CATEGORY-SIDEBAR not working

I have a Category named: EDV-Projekte and I have a Sidebar defined: MediaWiki:Sidebar/Category:EDV-Projekte. The Sidebar looks like this:

The Cartegoy-Sidebar are enabled in Localsettings.php but the side bar is not display. A GROUP-SIDEBAR is working. In the Mediawiki:Sidebar I have both entries:

Why is the sidebar for the category not working?