Title: Unserialize() Error on Submit
Last modified: August 22, 2016

---

# Unserialize() Error on Submit

 *  [rouviere](https://wordpress.org/support/users/rouviere/)
 * (@rouviere)
 * [11 years, 5 months ago](https://wordpress.org/support/topic/unserialize-error-on-submit/)
 * When I submit a quiz I get the following error:
 * > Notice: unserialize(): Error at offset 0 of 21 bytes in …/wp-content/plugins/
   > quiz-master-next/includes/mlw_quiz.php on line 1098
 * What is causing this and what is the solution?
 * Thanks.
 * [https://wordpress.org/plugins/quiz-master-next/](https://wordpress.org/plugins/quiz-master-next/)

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

 *  [Frank Corso](https://wordpress.org/support/users/fpcorso/)
 * (@fpcorso)
 * [11 years, 5 months ago](https://wordpress.org/support/topic/unserialize-error-on-submit/#post-5541190)
 * Greetings Rouviere:
 * Thank you for choosing to use this plugin!
 * This appears to be an issue with the certificate system. Can you navigate to 
   the Quiz Settings page of quiz and then go to the Certificate tab? From there,
   try to change the text in the Certificate Title field and then click Save Certificate
   Options. Let me know if that fixes the error you are experiencing.
 * If this does not fix the error, please answer the following questions:
    What 
   version of WordPress are you using? What version of Quiz Master Next do you have
   installed? What other plugins do you have installed?
 * _[ [Signature moderated](http://codex.wordpress.org/Forum_Welcome#Signatures)]_
 *  Thread Starter [rouviere](https://wordpress.org/support/users/rouviere/)
 * (@rouviere)
 * [11 years, 5 months ago](https://wordpress.org/support/topic/unserialize-error-on-submit/#post-5541192)
 * Hi Frank,
 * When I navigate to the Quiz Settings page I get more errors:
 * Notice: Undefined index: quiz_id in …/wp-content/plugins/quiz-master-next/includes/
   mlw_quiz_options.php on line 13
    Quiz Settings For Notice: Undefined variable:
   mlw_quiz_options in …/wp-content/plugins/quiz-master-next/includes/mlw_quiz_options.
   php on line 56
 * Notice: Trying to get property of non-object in …/wp-content/plugins/quiz-master-
   next/includes/mlw_quiz_options.php on line 56
 * I am running Quiz 3.6.1 on WP 4.0.1 and have the following plugins installed:
 * All In One WP Security
    Contact Form 7 Google Analytics by Yoast Meta Slider 
   Really Simple Captcha Responsive Lightbox Shortcodes Ultimate The Events Calendar
   W3 Total Cache WordPress SEO
 * Thanks!

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

The topic ‘Unserialize() Error on Submit’ is closed to new replies.

 * ![](https://ps.w.org/quiz-master-next/assets/icon-128x128.png?rev=3158087)
 * [Quiz and Survey Master (QSM) - Easy Quiz and Survey Maker](https://wordpress.org/plugins/quiz-master-next/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/quiz-master-next/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/quiz-master-next/)
 * [Active Topics](https://wordpress.org/support/plugin/quiz-master-next/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/quiz-master-next/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/quiz-master-next/reviews/)

 * 2 replies
 * 2 participants
 * Last reply from: [rouviere](https://wordpress.org/support/users/rouviere/)
 * Last activity: [11 years, 5 months ago](https://wordpress.org/support/topic/unserialize-error-on-submit/#post-5541192)
 * Status: not resolved