Templates: not showing category_name

{embed="Global_embeds/.header"}

{exp:channel:entries channel="nyheter" limit="20" paginate="both"}

<h3><a href="/{channel}/{url_title}">{title}</a></h3>

{preview}

<div class="date">Publicerad {entry_date format="%M %d, %Y - %h:%i %A"} i kategori <a href="/{channel}/kategori/{category_name}">{category_name}</a></div>

{paginate}

Sida {current_page} av {total_pages}. Sidor: {pagination_links}

{/paginate}

{/exp:channel:entries}

<hr >

{embed="Global_embeds/.footer"}