* adjust code for error.

module/tutorial/control.php

@@ -38,7 +38,7 @@ class tutorial extends control
             $this->loadModel('setting')->setItem("$account.tutorial.tasks.setting", $setting);
             $this->send(array('result' => 'success'));
         }
-        $setting = $this->config->tasks->setting;
+        $setting = isset($this->config->tasks->setting) ? $this->config->tasks->setting : '';
 
         if($this->viewType === 'json')
         {

module/tutorial/view/index.html.php

@@ -101,7 +101,7 @@ $(function()
     var lang         = 
     {
         tagetPageTip: '<?php echo $lang->tutorial->tagetPageTip ?>',
-        target      : '<?php echo $lang->tutorial->taget ?>'
+        target      : '<?php echo $lang->tutorial->target ?>'
     }
 
     console.log('TASKS', tasks);