fix fault if no controller when retrieving stats
diff --git a/planetstack/core/static/page_analytics.js b/planetstack/core/static/page_analytics.js
index 9cdd7ed..698396f 100644
--- a/planetstack/core/static/page_analytics.js
+++ b/planetstack/core/static/page_analytics.js
@@ -10,7 +10,9 @@
     type : 'GET',
     success: function(newData) {
         console.log(newData);
-        if (newData.stat_list.length > 0) {
+        if (newData.error) {
+            $(buttonSelector).text(newData.error);
+        } else if (newData.stat_list.length > 0) {
             value = newData.stat_list.slice(-1)[0].value;
             console.log(value);
             $(buttonSelector).text(Math.round(value)).show();