Title: call_user_func_array() expects parameter 1 to be a valid callback, function
Last modified: April 11, 2017

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# call_user_func_array() expects parameter 1 to be a valid callback, function

 *  [wpsheriff](https://wordpress.org/support/users/wpsheriff/)
 * (@wpsheriff)
 * [9 years, 1 month ago](https://wordpress.org/support/topic/call_user_func_array-expects-parameter-1-to-be-a-valid-callback-function/)
 * here is the full message:
 * Warning: call_user_func_array() expects parameter 1 to be a valid callback, function‘
   az_enqueue_color_picker’ not found or invalid function name in /home/nutrun/public_html/
   wp-includes/class-wp-hook.php on line 298
 * I noticed that error message after the programmer used some sort of back up restore
   software.
 * He tells me that this error message is with wordpress and he never touched the
   codes in wordpress. I need to know how to fix this before we launch and what 
   could have caused it.
 * Anyone has any idea? I search wordpress.org and Google, but no one seem to have
   encountered that before.
 * Note: I’m not a programmer, but I’ve been in the Internet marketing field for
   14 years. I do understand CSS and HTML. But not actual programming.
 * Thanks

Viewing 2 replies - 1 through 2 (of 2 total)

 *  [Michael](https://wordpress.org/support/users/alchymyth/)
 * (@alchymyth)
 * [9 years, 1 month ago](https://wordpress.org/support/topic/call_user_func_array-expects-parameter-1-to-be-a-valid-callback-function/#post-9020627)
 * possibly caused by this plugin [https://wordpress.org/plugins/woocommerce-frequently-bought-together/](https://wordpress.org/plugins/woocommerce-frequently-bought-together/)
 * if you are using this plugin,
    temporarily deactivate the plugin, and if this
   removes the problem, ask for help in the plugin’s forum at [https://wordpress.org/support/plugin/woocommerce-frequently-bought-together](https://wordpress.org/support/plugin/woocommerce-frequently-bought-together)
 *  Thread Starter [wpsheriff](https://wordpress.org/support/users/wpsheriff/)
 * (@wpsheriff)
 * [9 years, 1 month ago](https://wordpress.org/support/topic/call_user_func_array-expects-parameter-1-to-be-a-valid-callback-function/#post-9020781)
 * Yep, that did it.
 * Thanks!! I don’t even thing we were going to use that particular plugin.
 * Thanks again Michael.
 * Sheriff

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘call_user_func_array() expects parameter 1 to be a valid callback, function’
is closed to new replies.

## Tags

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

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 2 replies
 * 2 participants
 * Last reply from: [wpsheriff](https://wordpress.org/support/users/wpsheriff/)
 * Last activity: [9 years, 1 month ago](https://wordpress.org/support/topic/call_user_func_array-expects-parameter-1-to-be-a-valid-callback-function/#post-9020781)
 * Status: not resolved

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