Title: Error valid callback
Last modified: August 22, 2019

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# Error valid callback

 *  [Gustavo Troisi](https://wordpress.org/support/users/gus0074/)
 * (@gus0074)
 * [6 years, 9 months ago](https://wordpress.org/support/topic/error-valid-callback/)
 * Hello, this error appears once activate the plugin:
 * `Warning: call_user_func_array() expects parameter 1 to be a valid callback, 
   no array or string given in /srv/www/xxxx/public_html/wp-includes/class-wp-hook.
   php on line 286`
 * Any ideas?
    Thanks
    -  This topic was modified 6 years, 9 months ago by [Gustavo Troisi](https://wordpress.org/support/users/gus0074/).

The topic ‘Error valid callback’ is closed to new replies.

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 * 0 replies
 * 1 participant
 * Last reply from: [Gustavo Troisi](https://wordpress.org/support/users/gus0074/)
 * Last activity: [6 years, 9 months ago](https://wordpress.org/support/topic/error-valid-callback/)
 * Status: not resolved