Title: Errors when updating content
Last modified: October 23, 2025

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# Errors when updating content

 *  Resolved [tsagent](https://wordpress.org/support/users/tsagent/)
 * (@tsagent)
 * [7 months, 2 weeks ago](https://wordpress.org/support/topic/errors-when-updating-content/)
 * We’ve had this plugin added within the last few months. Recent updates have caused
   an issue when a user tries to update/save page or post content. I have to deactivate
   the plugin to resolve the error.
   Warning: Attempt to read property “post_type”
   on null in /home/brownecenter/www/www/wp-content/plugins/constant-contact-forms/
   includes/class-lists.php on line 768 Warning: Cannot modify header information–
   headers already sent by (output started at /home/brownecenter/www/www/wp-content/
   plugins/constant-contact-forms/includes/class-lists.php:768) in /home/brownecenter/
   www/www/wp-includes/functions.php on line 7168 Warning: Cannot modify header 
   information – headers already sent by (output started at /home/brownecenter/www/
   www/wp-content/plugins/constant-contact-forms/includes/class-lists.php:768) in/
   home/brownecenter/www/www/wp-includes/functions.php on line 7144 Warning: Cannot
   modify header information – headers already sent by (output started at /home/
   brownecenter/www/www/wp-content/plugins/constant-contact-forms/includes/class-
   lists.php:768) in /home/brownecenter/www/www/wp-admin/post.php on line 231 Warning:
   Cannot modify header information – headers already sent by (output started at/
   home/brownecenter/www/www/wp-content/plugins/constant-contact-forms/includes/
   class-lists.php:768) in /home/brownecenter/www/www/wp-includes/pluggable.php 
   on line 1450 Warning: Cannot modify header information – headers already sent
   by (output started at /home/brownecenter/www/www/wp-content/plugins/constant-
   contact-forms/includes/class-lists.php:768) in /home/brownecenter/www/www/wp-
   includes/pluggable.php on line 1453
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Ferrors-when-updating-content%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 4 replies - 1 through 4 (of 4 total)

 *  Plugin Contributor [Michael Beckwith](https://wordpress.org/support/users/tw2113/)
 * (@tw2113)
 * The BenchPresser
 * [7 months, 2 weeks ago](https://wordpress.org/support/topic/errors-when-updating-content/#post-18693122)
 * Hi [@tsagent](https://wordpress.org/support/users/tsagent/)
 * By any chance do you recall which version you were on previous to when these 
   errors were occurring? This would help isolate down to which versions to check
   on for changes around this error log.
 * Also an example URL of where people were editing content or trying to, would 
   be beneficial as well.
    -  This reply was modified 7 months, 2 weeks ago by [Michael Beckwith](https://wordpress.org/support/users/tw2113/).
 *  Thread Starter [tsagent](https://wordpress.org/support/users/tsagent/)
 * (@tsagent)
 * [7 months, 2 weeks ago](https://wordpress.org/support/topic/errors-when-updating-content/#post-18693271)
 * Hi [@tw2113](https://wordpress.org/support/users/tw2113/) 
   Thanks for getting
   back to me. The error is triggered in the admin when updating or creating a page
   or post…even saving a draft.We started using the Constant Contact Plugin back
   in the middle of June, Sorry, I don’t know which version that was but it was 
   a fresh install on the site.The site doesn’t get a lot of edits so today was 
   the first I’m hearing of this.
 *  Thread Starter [tsagent](https://wordpress.org/support/users/tsagent/)
 * (@tsagent)
 * [7 months, 2 weeks ago](https://wordpress.org/support/topic/errors-when-updating-content/#post-18693292)
 * Here’s a quick screen recording
   [https://www.dropbox.com/scl/fi/fo5h3j3d40beceaympse3/error-in-admin.mov?rlkey=1bxbc3zil8b67bklljhadjs3m&e=1&dl=0](https://www.dropbox.com/scl/fi/fo5h3j3d40beceaympse3/error-in-admin.mov?rlkey=1bxbc3zil8b67bklljhadjs3m&e=1&dl=0)
 *  Plugin Contributor [Michael Beckwith](https://wordpress.org/support/users/tw2113/)
 * (@tw2113)
 * The BenchPresser
 * [7 months, 2 weeks ago](https://wordpress.org/support/topic/errors-when-updating-content/#post-18693345)
 * Thanks, that should confirm all the parts we need to get a fix in place. I can’t
   promise for certain, but probably early next week at the earliest for a release
   that helps with this.

Viewing 4 replies - 1 through 4 (of 4 total)

The topic ‘Errors when updating content’ is closed to new replies.

 * ![](https://ps.w.org/constant-contact-forms/assets/icon-256x256.png?rev=2951825)
 * [Constant Contact Forms](https://wordpress.org/plugins/constant-contact-forms/)
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 * [Support Threads](https://wordpress.org/support/plugin/constant-contact-forms/)
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 * [Unresolved Topics](https://wordpress.org/support/plugin/constant-contact-forms/unresolved/)
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## Tags

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

 * 4 replies
 * 2 participants
 * Last reply from: [Michael Beckwith](https://wordpress.org/support/users/tw2113/)
 * Last activity: [7 months, 2 weeks ago](https://wordpress.org/support/topic/errors-when-updating-content/#post-18693345)
 * Status: resolved