diff --git a/module/story/control.php b/module/story/control.php
index ce133e6961..39aa73bb84 100755
--- a/module/story/control.php
+++ b/module/story/control.php
@@ -1947,6 +1947,7 @@ class story extends control
     {
         $this->loadModel('report');
         $this->view->charts = array();
+        $this->view->datas  = array();
 
         if(!empty($_POST))
         {
diff --git a/module/story/ui/report.html.php b/module/story/ui/report.html.php
index 7622eb2e69..92fddce047 100644
--- a/module/story/ui/report.html.php
+++ b/module/story/ui/report.html.php
@@ -38,7 +38,7 @@ $fnGenerateTabCharts = function(string $type) use($charts, $lang, $datas)
         (
             set::type($type),
             set::title($lang->story->report->charts[$chartType]),
-            set::datas($datas[$chartType]),
+            set::datas($datas[$chartType] ?? null),
             set::tableHeaders(array
             (
                 'item'    => $lang->story->report->$chartType->item,