Answers.Body: <p>You may want to check Firewall or the settings in <strong>WPSecurity</strong> (plugin) if you have that installed.  I ran into this problem and it was an option in WPSecurity for "Bad Query Strings" which blocked access to thumbnails in KCFinder. </p>
  
  <p>According to the plugin... <strong>Deny Bad Query Strings</strong></p>
  
  <blockquote>
    <p>This feature will write rules in your .htaccess file to prevent 
    malicious string attacks on your site using XSS. NOTE: Some of these
    strings might be used for plugins or themes and hence this might break
    some functionality. You are therefore strongly advised to take a
    backup of your active .htaccess file before applying this feature.</p>
  </blockquote>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2017-06-09T04:36:17.693Z
Answers.LastActivityDate: 2017-06-09T04:36:17.693Z
Answers.UserDisplayName: Greg Rundlett
Answers.Body: <p>Check the ownership of the folders where these images are uploaded to.</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2017-06-09T20:47:51.963Z
Answers.LastActivityDate: 2017-06-09T20:47:51.963Z
Answers.UserDisplayName: petednz - fuzion
Body: <p>I added images to the server via CiviMail (KCFinder).  But when trying to use the UI to insert an image and click "Browse Server" I receive an "Unknown Error". None of the images are displayed. I'm unable to locate the images and insert them into a new mailing. Already checked the Resource URL and Directories. See image attached. <a href="https://i.sstatic.net/9Ye0H.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/9Ye0H.jpg" alt="Unknown Error"></a> </p>
  
  <p>CiviCRM 4.7.11 and WordPress 4.6.1</p>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2016-12-22T07:33:06.843Z
Comments.Text: I have the same issue with WordPress 4.6.1 and 4.7.14. In my case I do not get "Unknown Error" but the waiting to load icon. It eventually times out and my only resource is to kill the page. I CAN successfully browse for images, send to the server, and insert them in my mailings. I just can't reuse them without uploading each time.
Comments.UserDisplayName: Karl Rudnick
Tags: <civimail><images><kcfinder>
Title: How to access images on server for CiviMail
ThreadText: # How to access images on server for CiviMail
  
  (Asked by: username_0 on 2016-09-16)
  
  I added images to the server via CiviMail (KCFinder). But when trying to use the UI to insert an image and click "Browse Server" I receive an "Unknown Error". None of the images are displayed. I'm unable to locate the images and insert them into a new mailing. Already checked the Resource URL and Directories. See image attached. [![Unknown Error](https://i.sstatic.net/9Ye0H.jpg)](https://i.sstatic.net/9Ye0H.jpg)
  
  CiviCRM 4.7.11 and WordPress 4.6.1
  
  **Tags:** civimail, images, kcfinder
  
  > **Comments:**
  > **username_1**: I have the same issue with WordPress 4.6.1 and 4.7.14. In my case I do not get "Unknown Error" but the waiting to load icon. It eventually times out and my only resource is to kill the page. I CAN successfully browse for images, send to the server, and insert them in my mailings. I just can't reuse them without uploading each time.  
  
  ---
  
  ## 2 answers
  
  ### Answer by username_2 on 2017-06-09. Score: 1
  
  You may want to check Firewall or the settings in **WPSecurity** (plugin) if you have that installed. I ran into this problem and it was an option in WPSecurity for "Bad Query Strings" which blocked access to thumbnails in KCFinder.
  
  According to the plugin... **Deny Bad Query Strings**
  
  > This feature will write rules in your .htaccess file to prevent
  > malicious string attacks on your site using XSS. NOTE: Some of these
  > strings might be used for plugins or themes and hence this might break
  > some functionality. You are therefore strongly advised to take a
  > backup of your active .htaccess file before applying this feature.
  
  
  ---
  
  ### Answer by username_3 on 2017-06-09. Score: 1
  
  Check the ownership of the folders where these images are uploaded to.
  
  
  ---
  
  