Title: json value isn’t an array VALUE: NULL
Last modified: March 7, 2023

---

# json value isn’t an array VALUE: NULL

 *  Resolved [christian-s](https://wordpress.org/support/users/christian-s/)
 * (@christian-s)
 * [3 years, 3 months ago](https://wordpress.org/support/topic/json-value-isnt-an-array-value-null-2/)
 * I am trying to migrate a site from one host to another. I can create the package
   and download form source site. When I try in run in the installer it gives me
   an error about not being able to create db and then it shows error “json value
   isn’t an array VALUE: NULL”
 * I have disabled Wordfence WAF, I have tried to remove and add the duplicator 
   plugin again on source site. But I cannot resolve this error.
 * What is going wrong?
 * The error lists
 *     ```wp-block-code
       EXCEPTION ERROR: json value isn't an array VALUE: NULL
       FILE:/home/frederik/public_html/dup-installer/libs/Snap/JsonSerialize/JsonSerialize.php[82]
   
       TRACE:
   
       0 /home/frederik/public_html/dup-installer/ctrls/classes/class.ctrl.extraction.php(206): Duplicator\Libs\Snap\JsonSerialize\JsonSerialize::unserializeToObj('', Object(DUP_Extraction))
   
       1 /home/frederik/public_html/dup-installer/ctrls/classes/class.ctrl.extraction.php(108): DUP_Extraction->loadData()
   
       2 /home/frederik/public_html/dup-installer/ctrls/classes/class.ctrl.extraction.php(95): DUP_Extraction->initData()
   
       3 /home/frederik/public_html/dup-installer/ctrls/classes/class.ctrl.extraction.php(82): DUP_Extraction->__construct()
   
       4 /home/frederik/public_html/dup-installer/ctrls/classes/class.ctrl.ajax.php(205): DUP_Extraction::getInstance()
   
       5 /home/frederik/public_html/dup-installer/ctrls/classes/class.ctrl.ajax.php(93): DUPX_Ctrl_ajax::actions('extract')
   
       6 /home/frederik/public_html/dup-installer/main.installer.php(56): DUPX_Ctrl_ajax::controller()
   
       7 {main}
       ```
   
    -  This topic was modified 3 years, 3 months ago by [christian-s](https://wordpress.org/support/users/christian-s/).

Viewing 1 replies (of 1 total)

 *  Thread Starter [christian-s](https://wordpress.org/support/users/christian-s/)
 * (@christian-s)
 * [3 years, 3 months ago](https://wordpress.org/support/topic/json-value-isnt-an-array-value-null-2/#post-16538141)
 * Resolved – turns out that I had run out of available disk space on the new hosting
   solution. So this error was a result of not being able to write more data to 
   the disk.

Viewing 1 replies (of 1 total)

The topic ‘json value isn’t an array VALUE: NULL’ is closed to new replies.

 * ![](https://ps.w.org/duplicator/assets/icon-256x256.png?rev=2906985)
 * [Duplicator - Backups & Migration Plugin - Cloud Backups, Scheduled Backups, & More](https://wordpress.org/plugins/duplicator/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/duplicator/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/duplicator/)
 * [Active Topics](https://wordpress.org/support/plugin/duplicator/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/duplicator/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/duplicator/reviews/)

 * 1 reply
 * 1 participant
 * Last reply from: [christian-s](https://wordpress.org/support/users/christian-s/)
 * Last activity: [3 years, 3 months ago](https://wordpress.org/support/topic/json-value-isnt-an-array-value-null-2/#post-16538141)
 * Status: resolved