Title: Server 400 error
Last modified: January 26, 2023

---

# Server 400 error

 *  [jokeai](https://wordpress.org/support/users/jokeai/)
 * (@jokeai)
 * [3 years, 4 months ago](https://wordpress.org/support/topic/server-400-error/)
 * Hi there!
 * I’m having severe issues pinpointing the cause of a server 400 issue when clicking
   the publish button on elementor.
 * I have tried deactivating all plugins other than elementor, and it would allow
   me to click publish, publish once and return to the server error, with no changes
   ultimately made.
 * I have enabled PHP logging to try and pinpoint the issue, and which ever plugin
   is at the top of my installed list, appears to be the next one to appear in the
   log files. If I deactivate it, the next active plugin’s name will be in these
   logs.
 * [25-Jan-2023 10:32:42 UTC] PHP Warning: Cannot modify header information – headers
   already sent by (output started at /usr/www/users/**user**/wp-content/plugins/
   affiliate-for-woocommerce/affiliate-for-woocommerce.php:79) in /usr/www/users/**
   user**/wp-admin/includes/misc.php on line 1416
 * Or
 * I contacted Xneelo hosting for support and this also seems like a dead end.
 * They have increased the memory to limit to double what is usually available so
   we could test, and it hasn’t solved the problem.
 * It seems like a PHP issue of some sort, however all limits are set to their maximum.
 * I have also cleared all revisions and auto drafts to clear storage.
 * Honestly been stuck with this for over a week, does anyone maybe have an idea
   of what I can try next?

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

 *  [Pieterjan Deneys](https://wordpress.org/support/users/nekojonez/)
 * (@nekojonez)
 * [3 years, 4 months ago](https://wordpress.org/support/topic/server-400-error/#post-16411103)
 * Have you tried to upgrade/downgrade your PHP version? I read on other topics 
   that might help in PHP issues like these.
 *  [mrtom414](https://wordpress.org/support/users/mrtom414/)
 * (@mrtom414)
 * [3 years, 4 months ago](https://wordpress.org/support/topic/server-400-error/#post-16411805)
 * Usually when the message header already sent there is some kind of error that
   is being issued and is outputted before the real header gets sent. If possible
   try looking at your error logs to see if they show any php errors.
 * you might also want to try disabling your plugins and reenabling to see if the
   error goes away. If it does reenable them one at a time to see which plugin causes
   the error to reappear. If you find the plugin try posting in the help forum for
   that plugin.
    -  This reply was modified 3 years, 4 months ago by [mrtom414](https://wordpress.org/support/users/mrtom414/).

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

The topic ‘Server 400 error’ is closed to new replies.

## Tags

 * [elementor error](https://wordpress.org/support/topic-tag/elementor-error/)
 * [php-error](https://wordpress.org/support/topic-tag/php-error/)
 * [server-error](https://wordpress.org/support/topic-tag/server-error/)

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 2 replies
 * 3 participants
 * Last reply from: [mrtom414](https://wordpress.org/support/users/mrtom414/)
 * Last activity: [3 years, 4 months ago](https://wordpress.org/support/topic/server-400-error/#post-16411805)
 * Status: not resolved

## Topics

### Topics with no replies

### Non-support topics

### Resolved topics

### Unresolved topics

### All topics