quanto2009 on "[Plugin: YOP Poll] Yop Poll PHP Fatal error"

I am trying to edit my poll but when I click on "All Polls" I receive this erro message:
PHP Fatal error: Call to undefined method WP_Error::get_items() in E:\website adress\wwwroot\info\wp-content\plugins\yop-poll\inc\admin.php on line 8217

http://wordpress.org/plugins/yop-poll/