dont try routablepageurl when there is no page

district/templates/district/district_article_page.html

@@ -2,7 +2,10 @@
 {% load static wagtailcore_tags wagtailimages_tags wagtailroutablepage_tags %}
 
 {% block content %}
-  {% routablepageurl page.root_page.articles_page "tags" as articles_tag_page_url %}
+  {% if page.root_page.articles_page %}
+    {% routablepageurl page.root_page.articles_page "tags" as articles_tag_page_url %}
+  {% endif %}
+
   <article>
     <link itemprop="mainEntityOfPage" href="{{ page.url }}">
     <meta itemprop="datePublished" content="{{ page.last_published_at }}">