diff --git a/module/task/zen.php b/module/task/zen.php
index ec75c3915c..0e8fd1089b 100644
--- a/module/task/zen.php
+++ b/module/task/zen.php
@@ -234,7 +234,7 @@ class taskZen extends task
         $executionTeams    = array();
         $executionIdList   = array_unique(array_column($tasks, 'execution'));
         $executionTeamList = $this->execution->getMembersByIdList($executionIdList);
-        foreach($executionIdList as $id) $executionTeams[$id] = array_column((array)$executionTeamList[$id], 'account');
+        foreach($executionIdList as $id) $executionTeams[$id] = array_column((array)zget($executionTeamList, $id, array()), 'account');
 
         $moduleGroup = array();
         if(!$executionID)