CKEDITOR和KCFINDER上载有效，图像缩略图浏览失败

Question

安装CKEDITOR和KCFINDER的Vanilla即可正常工作。我可以从计算机中选择一个图像并将其发送到服务器。图像在CKeditor上可以正常弹出。

如果我尝试将图像放入已经存在的CKeditor中，则浏览选项将打开kcfinder，我可以看到列出的所有我已经上传的图像。

问题是图像缩略图不显示（请参阅附件照片）。我只看到列出文件名的空白框。

图像和缩略图在服务器上，我可以选择空白缩略图。将所选图像放入CKeditor窗口后，实际图像会正确显示。绝对是关于KCfinder浏览器中图像的显示。

有人有什么想法吗？我尝试从上传目录中删除htaccess文件，并在配置中禁用_check4htaccess选项。问题仍然存在。

添加的配置文件

<?php

/** This file is part of KCFinder project
*
*      @desc Base configuration file
*   @package KCFinder
*   @version 3.12
*    @author Pavel Tzonkov <sunhater@sunhater.com>
* @copyright 2010-2014 KCFinder Project
*   @license http://opensource.org/licenses/GPL-3.0 GPLv3
*   @license http://opensource.org/licenses/LGPL-3.0 LGPLv3
*      @link http://kcfinder.sunhater.com
*/

/* IMPORTANT!!! Do not comment or remove uncommented settings in this file
even if you are using session configuration.
See http://kcfinder.sunhater.com/install for setting descriptions */

$_CONFIG = array(


// GENERAL SETTINGS

'disabled' => true,
'uploadURL' => "https://example.com/library/kcfinder/upload",
'uploadDir' => "",
'theme' => "dark",

'types' => array(

// (F)CKEditor types
    'files'   =>  "",
    'flash'   =>  "swf",
    'images'  =>  "*img",

// TinyMCE types
    'file'    =>  "",
    'media'   =>  "swf flv avi mpg mpeg qt mov wmv asf rm",
    'image'   =>  "*img",
),


// IMAGE SETTINGS

'imageDriversPriority' => "imagick gmagick gd",
'jpegQuality' => 90,
'thumbsDir' => ".thumbs",

'maxImageWidth' => 0,
'maxImageHeight' => 0,

'thumbWidth' => 100,
'thumbHeight' => 100,

'watermark' => "",


// DISABLE / ENABLE SETTINGS

'denyZipDownload' => false,
'denyUpdateCheck' => false,
'denyExtensionRename' => false,


// PERMISSION SETTINGS

'dirPerms' => 0755,
'filePerms' => 0644,

'access' => array(

    'files' => array(
        'upload' => true,
        'delete' => true,
        'copy'   => true,
        'move'   => true,
        'rename' => true
    ),

    'dirs' => array(
        'create' => true,
        'delete' => true,
        'rename' => true
    )
),

'deniedExts' => "exe com msi bat cgi pl php phps phtml php3 php4 php5 php6 
py pyc pyo pcgi pcgi3 pcgi4 pcgi5 pchi6",


// MISC SETTINGS

'filenameChangeChars' => array(/*
    ' ' => "_",
    ':' => "."
*/),

'dirnameChangeChars' => array(/*
    ' ' => "_",
    ':' => "."
*/),

'mime_magic' => "",

'cookieDomain' => "",
'cookiePath' => "",
'cookiePrefix' => 'KCFINDER_',


// THE FOLLOWING SETTINGS CANNOT BE OVERRIDED WITH SESSION SETTINGS

'_normalizeFilenames' => false,
'_check4htaccess' => false,
//'_tinyMCEPath' => "/tiny_mce",

'_sessionVar' => "KCFINDER",
//'_sessionLifetime' => 30,
//'_sessionDir' => "/full/directory/path",
//'_sessionDomain' => ".mysite.com",
//'_sessionPath' => "/my/path",

//'_cssMinCmd' => "java -jar /path/to/yuicompressor.jar --type css 
{file}",
//'_jsMinCmd' => "java -jar /path/to/yuicompressor.jar --type js {file}",

);

?>