fix

app/logical/sources/site.rb

@@ -24,8 +24,8 @@ module Sources
         :profile_url => profile_url,
         :image_url => image_url,
         :tags => tags,
-        :danbooru_name => artist_record.first.try(:name),
+        :danbooru_name => artist_record.try(:first).try(:name),
-        :danbooru_id => artist_record.first.try(:id),
+        :danbooru_id => artist_record.try(:first).try(:id),
         :unique_id => unique_id
       }.to_json
     end