Title: Error: call_user_func_array()
Last modified: August 24, 2020

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# Error: call_user_func_array()

 *  Resolved [stutaines](https://wordpress.org/support/users/stutaines/)
 * (@stutaines)
 * [5 years, 9 months ago](https://wordpress.org/support/topic/error-call_user_func_array-5/)
 * I get this error any time I try to clone an item.
    I updated a few plugins so
   I assume there’s a conflict. But I don’t know which one to roll back.
 * Error:Warning: call_user_func_array() expects parameter 1 to be a valid callback,
   class ‘PLL_Duplicate_Post’ does not have a method ‘taxonomies_blacklist’ in /
   home/kidscamp/public_html/wp-includes/class-wp-hook.php on line 289
    Warning:
   in_array() expects parameter 2 to be array, null given in /home/kidscamp/public_html/
   wp-content/plugins/duplicate-post/duplicate-post-options.php on line 557

Viewing 6 replies - 1 through 6 (of 6 total)

 *  Plugin Author [Enrico Battocchi](https://wordpress.org/support/users/lopo/)
 * (@lopo)
 * [5 years, 9 months ago](https://wordpress.org/support/topic/error-call_user_func_array-5/#post-13305541)
 * Hi [@stutaines](https://wordpress.org/support/users/stutaines/),
    do you have
   by chance Polylang installed and activated? It looks like `PLL_Duplicate_Post`
   is a class defined by that plugin. Can You confirm this?
 *  Thread Starter [stutaines](https://wordpress.org/support/users/stutaines/)
 * (@stutaines)
 * [5 years, 9 months ago](https://wordpress.org/support/topic/error-call_user_func_array-5/#post-13305568)
 * Dear Enrico!
    Thanks for getting back. Yes – I have polylang installed!
 *  Plugin Support [Michael Tiña](https://wordpress.org/support/users/mikes41720/)
 * (@mikes41720)
 * [5 years, 9 months ago](https://wordpress.org/support/topic/error-call_user_func_array-5/#post-13309238)
 * Hi [@stutaines](https://wordpress.org/support/users/stutaines/)
 * After a bit of further investigation, it looks like a Polylang bug which conflicts
   with one of our options. The good thing is that they fixed it in their repo and
   it looks like [they’re going to release a patch today](https://github.com/polylang/polylang/commit/bb5e7f55ab90277363d4077586bb9eaabe12f752).
 * Please do update to v2.8.1 of Polylang once it releases and the issue should 
   be resolved. Please let us know if you still have any issues or concerns after
   updating. Thank you!
 *  [Jeroen Rotty](https://wordpress.org/support/users/jeroenrotty/)
 * (@jeroenrotty)
 * [5 years, 9 months ago](https://wordpress.org/support/topic/error-call_user_func_array-5/#post-13309736)
 * Hi [@stutaines](https://wordpress.org/support/users/stutaines/),
 * Just a heads-up, the Polylang team has just [released an update](https://wordpress.org/plugins/polylang/#developers)
   which should fix this issue. Can you please update the plugin and check if that
   resolves the issue?
 * Thanks!
 *  Thread Starter [stutaines](https://wordpress.org/support/users/stutaines/)
 * (@stutaines)
 * [5 years, 9 months ago](https://wordpress.org/support/topic/error-call_user_func_array-5/#post-13310676)
 * That was it! Updated and error free now.
    Thank you for the excellent support!!
 *  [Jeroen Rotty](https://wordpress.org/support/users/jeroenrotty/)
 * (@jeroenrotty)
 * [5 years, 9 months ago](https://wordpress.org/support/topic/error-call_user_func_array-5/#post-13310684)
 * Awesome to hear your kind words. Always happy to help.
 * We’ll mark this topic as resolved. If you have any other questions, feel free
   to open a new topic.

Viewing 6 replies - 1 through 6 (of 6 total)

The topic ‘Error: call_user_func_array()’ is closed to new replies.

 * ![](https://ps.w.org/duplicate-post/assets/icon-256x256.png?rev=2336666)
 * [Yoast Duplicate Post](https://wordpress.org/plugins/duplicate-post/)
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## Tags

 * [error message](https://wordpress.org/support/topic-tag/error-message/)

 * 6 replies
 * 4 participants
 * Last reply from: [Jeroen Rotty](https://wordpress.org/support/users/jeroenrotty/)
 * Last activity: [5 years, 9 months ago](https://wordpress.org/support/topic/error-call_user_func_array-5/#post-13310684)
 * Status: resolved