Title: Fatal Error when submitting form
Last modified: January 20, 2021

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# Fatal Error when submitting form

 *  Resolved [databell96](https://wordpress.org/support/users/databell96/)
 * (@databell96)
 * [5 years, 4 months ago](https://wordpress.org/support/topic/fatal-error-when-submitting-form/)
 * My apologies in advance, but my clients site is currently in Under Construction
   mode. There’s a form there that does work but it”s not connected to the plugin.
 * My problem is I have a from embedded in the footer of my clients upcoming site.
   But when trying it out, I get the following fatal error:
 * >  Fatal error: Uncaught TypeError: Argument 3 passed to MC4WP_MailChimp::list_add_tags_to_subscriber()
   > must be of the type array, null given, called in /home/customer/www/touchglovz.
   > com/public_html/wp-content/plugins/mailchimp-for-wp/includes/class-mailchimp.
   > php on line 97 and defined in /home/customer/www/touchglovz.com/public_html/
   > wp-content/plugins/mailchimp-for-wp/includes/class-mailchimp.php:151 Stack 
   > trace: #0 /home/customer/www/touchglovz.com/public_html/wp-content/plugins/
   > mailchimp-for-wp/includes/class-mailchimp.php(97): MC4WP_MailChimp->list_add_tags_to_subscriber(‘
   > 443239e27b’, Object(stdClass), NULL) #1 /home/customer/www/touchglovz.com/public_html/
   > wp-content/plugins/mailchimp-for-wp/includes/forms/class-form-listener.php(
   > 134): MC4WP_MailChimp->list_subscribe(‘443239e27b’, ‘dzign@datatv.co…’, Array,‘
   > 1’, ‘1’) #2 /home/customer/www/touchglovz.com/public_html/wp-content/plugins/
   > mailchimp-for-wp/includes/forms/class-form-listener.php(54): MC4WP_Form_Listener-
   > >process_subscribe_form(Object(MC4WP_Form)) #3 /home/cus in /home/customer/
   > www/touchglovz.com/public_html/wp-content/plugins/mailchimp-for-wp/includes/
   > class-mailchimp.php on line 151
 * Already went ahead and deactivated plugins but no change. Theme in Ocean WP. 
   Why is this happening?
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Ffatal-error-when-submitting-form%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 5 replies - 1 through 5 (of 5 total)

 *  Plugin Contributor [Lap](https://wordpress.org/support/users/lapzor/)
 * (@lapzor)
 * [5 years, 4 months ago](https://wordpress.org/support/topic/fatal-error-when-submitting-form/#post-13936281)
 * Under Mailchimp for WP > Form > Settings, what is filled in the Subscriber tags
   field? Does it maybe have just a space or a comma in it that you can remove, 
   or some other unexpected character?
 *  Plugin Author [Danny van Kooten](https://wordpress.org/support/users/dvankooten/)
 * (@dvankooten)
 * [5 years, 4 months ago](https://wordpress.org/support/topic/fatal-error-when-submitting-form/#post-13936787)
 * Hello [@databell96](https://wordpress.org/support/users/databell96/),
 * We believe this should be fixed if you update to the version we just released,
   [Mailchimp for WordPress version 4.8.3](https://wordpress.org/plugins/mailchimp-for-wp/).
 * Hope that helps, good luck!
 *  [Optimiza](https://wordpress.org/support/users/malditoweekend/)
 * (@malditoweekend)
 * [5 years, 4 months ago](https://wordpress.org/support/topic/fatal-error-when-submitting-form/#post-13940031)
 * Thank God it was resolved. In our case, this error generated dozen of duplicate
   orders (Woocommerce), and also the orders didn’t get through our Payment Gateway.
   After the update, the orders started to come in normally.
 * “MC4WP_MailChimp::list_add_tags_to_subscriber() must be of the type array, null
   given”
 *  Thread Starter [databell96](https://wordpress.org/support/users/databell96/)
 * (@databell96)
 * [5 years, 4 months ago](https://wordpress.org/support/topic/fatal-error-when-submitting-form/#post-13940038)
 * Yes, it is working now. Thanks for fixing that so quickly.
 *  Plugin Author [Danny van Kooten](https://wordpress.org/support/users/dvankooten/)
 * (@dvankooten)
 * [5 years, 4 months ago](https://wordpress.org/support/topic/fatal-error-when-submitting-form/#post-13941686)
 * Glad that did it! I’m sorry for the hassle this caused. =(

Viewing 5 replies - 1 through 5 (of 5 total)

The topic ‘Fatal Error when submitting form’ is closed to new replies.

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## Tags

 * [fatal error](https://wordpress.org/support/topic-tag/fatal-error/)
 * [ocean wp](https://wordpress.org/support/topic-tag/ocean-wp/)

 * 5 replies
 * 4 participants
 * Last reply from: [Danny van Kooten](https://wordpress.org/support/users/dvankooten/)
 * Last activity: [5 years, 4 months ago](https://wordpress.org/support/topic/fatal-error-when-submitting-form/#post-13941686)
 * Status: resolved