Title: Error Message when on Customizer screen
Last modified: August 30, 2016

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# Error Message when on Customizer screen

 *  Resolved [Ganis Irawan](https://wordpress.org/support/users/dmasta/)
 * (@dmasta)
 * [10 years, 6 months ago](https://wordpress.org/support/topic/error-message-when-on-customizer-screen/)
 * When working on customizer screen I got this error message
 * > Warning: call_user_func() expects parameter 1 to be a valid callback, function‘
   > color’ not found or invalid function name in …/public/wp-content/themes/matrix/
   > inc/kirki/includes/class-kirki-output-css.php on line 164
 * how to fix it?

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

 *  Theme Author [WebHunt Infotech](https://wordpress.org/support/users/webhuntinfotech/)
 * (@webhuntinfotech)
 * [10 years, 6 months ago](https://wordpress.org/support/topic/error-message-when-on-customizer-screen/#post-6872265)
 * Hi,
 * Which version of WordPress and Theme you are using.
 * Let me know for further assistance.
 * Thanks
 *  Theme Author [WebHunt Infotech](https://wordpress.org/support/users/webhuntinfotech/)
 * (@webhuntinfotech)
 * [10 years, 6 months ago](https://wordpress.org/support/topic/error-message-when-on-customizer-screen/#post-6872279)
 * Open customizer.php file find code `'sanitize_callback'=>'color'`
    and comment
   it. save the changes. Thanks
 *  Theme Author [WebHunt Infotech](https://wordpress.org/support/users/webhuntinfotech/)
 * (@webhuntinfotech)
 * [10 years, 6 months ago](https://wordpress.org/support/topic/error-message-when-on-customizer-screen/#post-6872296)
 * Hi,
 * did the above solution work for you.
 * Thanks

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

The topic ‘Error Message when on Customizer screen’ is closed to new replies.

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 * 3 replies
 * 2 participants
 * Last reply from: [WebHunt Infotech](https://wordpress.org/support/users/webhuntinfotech/)
 * Last activity: [10 years, 6 months ago](https://wordpress.org/support/topic/error-message-when-on-customizer-screen/#post-6872296)
 * Status: resolved