fix when no news is found

newsbox/views.py

@@ -42,8 +42,9 @@ class NewsboxBaseArchiveView(NewsboxPublishedMixinView):
             'title_url': '',
             'newsbox_opts': self.model._newsbox_meta,
             'date_list_period': self.date_list_period,
-            'current_date': context['object_list'].first().newsbox_publication_start_date
         })
+        if context['object_list']:
+            context['current_date'] = context['object_list'][0].newsbox_publication_start_date
         return context