Title: Invalid backend response- JSON error
Last modified: October 26, 2016

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# Invalid backend response- JSON error

 *  Resolved [butchershopdustin](https://wordpress.org/support/users/butchershopdustin/)
 * (@butchershopdustin)
 * [9 years, 7 months ago](https://wordpress.org/support/topic/invalid-backend-response-json-error/)
 * I installed this plugin on Pantheon server. Now get the JSON error. It seems 
   to work locally on my Mac. Running WordPress 4.6.1
 * I tested in Chrome, Safari, Firefox.- All current.
 * I installed through WordPress plug in manager and also direct FTP upload.
 * I’ve only one user right now, and set its folders to direct at wp-content/uploads
   and wp-content/uploads/fileManagerFiles/
 * The user doesn’t have any other folders.
 * I read posts which directed us to change file permissions to 755 or 0755.
 * I updated those folders permissions, mentioned above, and their subfolders.
 * I still receive the error. Is there a different folder which I should update?
 * Please advise.
    -  This topic was modified 9 years, 7 months ago by [butchershopdustin](https://wordpress.org/support/users/butchershopdustin/).
      Reason: specified wordpress version

Viewing 3 replies - 1 through 3 (of 3 total)

 *  Thread Starter [butchershopdustin](https://wordpress.org/support/users/butchershopdustin/)
 * (@butchershopdustin)
 * [9 years, 7 months ago](https://wordpress.org/support/topic/invalid-backend-response-json-error/#post-8360818)
 * a little more info. In the log on Pantheon, it shows this error:
 * session_start(): Failed to initialize storage module: user (path: )
    in file:
   wp-content/plugins/advanced_file_manager_5/php/elFinderSession.php:43
 * I’ve tried setting permissions on the “advanced_file_manager_5” plugin directory
   and its subfiles & subfolders to 0775, 0777, and 0755- testing each time. But
   still have the same problem.
    -  This reply was modified 9 years, 7 months ago by [butchershopdustin](https://wordpress.org/support/users/butchershopdustin/).
 *  Thread Starter [butchershopdustin](https://wordpress.org/support/users/butchershopdustin/)
 * (@butchershopdustin)
 * [9 years, 7 months ago](https://wordpress.org/support/topic/invalid-backend-response-json-error/#post-8361584)
 * Also, there are no other plugins installed. Just workdpress 4.6.1 and PHP 5.5
   on Pantheon.
    The permissions ar open for rwx on all 3 user groups.
 *  Plugin Contributor [Aftabul Islam](https://wordpress.org/support/users/aihimel/)
 * (@aihimel)
 * [9 years, 7 months ago](https://wordpress.org/support/topic/invalid-backend-response-json-error/#post-8370308)
 * **[@butchershopdustin](https://wordpress.org/support/users/butchershopdustin/)**
 * Are you sure it is file manager plugin? I see you mention an error at: file: 
   wp-content/plugins/advanced_file_manager_5/php/elFinderSession.php:43 this file.
 * But the folder name for the file manager plugin is just “file-manager” not “advanced_file_manager_5”
 * Thanks
    Aftabul Islam

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘Invalid backend response- JSON error’ is closed to new replies.

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 * 3 replies
 * 2 participants
 * Last reply from: [Aftabul Islam](https://wordpress.org/support/users/aihimel/)
 * Last activity: [9 years, 7 months ago](https://wordpress.org/support/topic/invalid-backend-response-json-error/#post-8370308)
 * Status: resolved