Topic on Project:Support desk

I've just installed a fresh copy of MediaWiki, and have created a few pages. However, when I try to invoke the "Citation needed" template, either with {{Cn}} or {{Citation needed}}, it renders on the page as Template:Cn or Template:Citation needed respectively.

Is there a specific extension that needs to be enabled? Do the citation templates have to be added to an installation manually? I apologise if this is a basic issue, but I haven't been able to find any information online besides the MediaWiki article on usage of the template, not it's installation...

You could add the missing template page to your wiki by basing it on Wikipedia's https://en.wikipedia.org/wiki/Template:Citation_needed

All templates have to be added manually. See Manual:Importing Wikipedia infoboxes tutorial (That's about infoboxes, but applies to all templates)