Title: Error
Last modified: August 21, 2016

---

# Error

 *  [vir27](https://wordpress.org/support/users/vir27/)
 * (@vir27)
 * [12 years, 9 months ago](https://wordpress.org/support/topic/error-238/)
 * Hi,
 * i got this error after installation and that’s why it’s not working at front 
   end.
 * call_user_func() expects parameter 1 to be a valid callback, function ” not found
   or invalid function name in /home/techmark/public_html/wp-admin/includes/template.
   php on line 1119
 * Please check and provide solution.
 * [http://wordpress.org/plugins/wp-math-captcha/](http://wordpress.org/plugins/wp-math-captcha/)

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

 *  Plugin Author [dFactory](https://wordpress.org/support/users/dfactory/)
 * (@dfactory)
 * [12 years, 9 months ago](https://wordpress.org/support/topic/error-238/#post-4051860)
 * Math Captcha is not multisite compatible yet. That’s why you have this error.
   Try to run it on a non-multisite install.
 *  [reidy68](https://wordpress.org/support/users/reidy68/)
 * (@reidy68)
 * [12 years, 9 months ago](https://wordpress.org/support/topic/error-238/#post-4051940)
 * …I’m not sure what’s going on but I keep getting an invalid captcha number, when
   the answer is correct? (Validation errors occurred. Please confirm the fields
   and submit it again. It’s only just started happening as far as I know? I tested
   the site once it was live and all seemed to be working fine. Here’s the link 
   [http://reliantroofingsystems.com/contact-us](http://reliantroofingsystems.com/contact-us)
   If you require any other info, please let me know? Cheers!

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

The topic ‘Error’ is closed to new replies.

 * ![](https://s.w.org/plugins/geopattern-icon/wp-math-captcha_2d554b.svg)
 * [Math Captcha](https://wordpress.org/plugins/wp-math-captcha/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/wp-math-captcha/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/wp-math-captcha/)
 * [Active Topics](https://wordpress.org/support/plugin/wp-math-captcha/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/wp-math-captcha/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/wp-math-captcha/reviews/)

## Tags

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

 * 2 replies
 * 3 participants
 * Last reply from: [reidy68](https://wordpress.org/support/users/reidy68/)
 * Last activity: [12 years, 9 months ago](https://wordpress.org/support/topic/error-238/#post-4051940)
 * Status: not resolved