Redux媒体字段不显示默认图像预览

我使用Redux框架在我的Wordpress主题中添加主题选项。现在我的问题是，媒体字段不显示默认图像预览。我的密码是波纹管 -Redux媒体字段不显示默认图像预览

Redux::setSection($opt_name, array(
    'icon' => 'el el-smiley', 
    'title' => 'Header Optipns', 
    'fields' => array(
     array(
      'title' => __('Logo Uploader','zText'), 
      'subtitle' => __('Upload your Logo', 'zText'), 
      'desc' => __('Upload any image or logo whatever you like','zText'), 
      'type' => 'media', 
      'id' => 'logo-uplodaer', 
      'default' => array(
       'url'=> get_template_directory_uri().'/images/logo.png' 
      ), 
     ), 
     array(
     'title' => 'Gender', 
     'type' => 'radio', 
     'id' => 'gender', 
     'options' => array(
      '1' => 'Male', 
      '2' => 'Female', 
      '3' => 'Hurmoprodite' 
     ), 
     'default' => '2' 

     ), 
     array(
     'title' => 'Color', 
     'type' => 'color', 
     'id' => 'color', 
     'drfault' => '#ffffff', 
     'validate' => 'color' 
     ) 
    ) 
) 
);

来源

2016-01-25 Kallol Das