zend-framework2 - Zend フレームワーク 2 フラッシュ メッセンジャー エラー

Question

flashmessenger バージョン 2.1.0 でこのエラーに直面しています

Warning: Class __PHP_Incomplete_Class has no unserializer in /home/test/public_html/index.php on line 17 Fatal error: Zend\Mvc\Controller\Plugin\FlashMessenger::getMessages(): The script tried to execute a method or access a property of an incomplete object. Please ensure that the class definition "Zend\Stdlib\SplQueue" of the object you are trying to operate on was loaded _before_ unserialize() gets called or provide a __autoload() function to load the class definition in /home/test/vendor/zendframework/zendframework/library/Zend/Mvc/Controller/Plugin/FlashMessenger.php on line 288

In index.php : session is started in line 17. 

コントローラーで:

$this->flashMessenger()->addMessage('Updated Successfully.'); 


$flashMessenger = $this->flashMessenger(); 
if($flashMessenger->hasMessages()) { 
     $return['messages'] = $flashMessenger->getMessages(); 
} 

助けてください私は何か間違ったことをしましたか?