Title: Error with pluggable.php (cannot modify headers info)
Last modified: August 20, 2016

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# Error with pluggable.php (cannot modify headers info)

 *  Resolved [sit441](https://wordpress.org/support/users/sit441/)
 * (@sit441)
 * [13 years, 3 months ago](https://wordpress.org/support/topic/error-with-pluggablephp-cannot-modify-headers-info/)
 * Hello,
 * Wp: 3.5.1
    Plugin: 1.3.4.4
 * Did: installed, activated, got error. “Warning: Cannot modify header information–
   headers already sent by (output started at /xxx/wp-includes/l10n.php:142) in /
   xxx/wp-includes/pluggable.php on line 876”
 * Next: checked spaces, added ?>, replaced pluggable.php with new one. Nothing 
   helps. Plugin works, but there’s no general meta box, as shown in screenshots.
 * [http://wordpress.org/extend/plugins/wordpress-seo/](http://wordpress.org/extend/plugins/wordpress-seo/)

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

 *  Thread Starter [sit441](https://wordpress.org/support/users/sit441/)
 * (@sit441)
 * [13 years, 3 months ago](https://wordpress.org/support/topic/error-with-pluggablephp-cannot-modify-headers-info/#post-3431899)
 * Sorry, reactivated plugin, meta box is back.
    The error is still showing during
   activation, but it seems everyting to be working.
 *  [lhartley](https://wordpress.org/support/users/lhartley/)
 * (@lhartley)
 * [13 years, 3 months ago](https://wordpress.org/support/topic/error-with-pluggablephp-cannot-modify-headers-info/#post-3432075)
 * Sorry didn’t realize this one was resolved. Started new one.
 *  [rch316](https://wordpress.org/support/users/rch316/)
 * (@rch316)
 * [13 years, 3 months ago](https://wordpress.org/support/topic/error-with-pluggablephp-cannot-modify-headers-info/#post-3432130)
 * I am having this same problem. Can you tell me how you fixed it? Thanks!
 *  [rch316](https://wordpress.org/support/users/rch316/)
 * (@rch316)
 * [13 years, 3 months ago](https://wordpress.org/support/topic/error-with-pluggablephp-cannot-modify-headers-info/#post-3432131)
 * It is showing the url in the title bar and I am getting the same error you posted
   above.
 *  [Randy King](https://wordpress.org/support/users/randyking/)
 * (@randyking)
 * [13 years, 3 months ago](https://wordpress.org/support/topic/error-with-pluggablephp-cannot-modify-headers-info/#post-3432133)
 * I describe the fix in this reply to Callie…
 * [http://wordpress.org/support/topic/yoast-seo-plugin-causing-my-website-to-break?replies=2](http://wordpress.org/support/topic/yoast-seo-plugin-causing-my-website-to-break?replies=2)

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

The topic ‘Error with pluggable.php (cannot modify headers info)’ is closed to new
replies.

 * ![](https://ps.w.org/wordpress-seo/assets/icon-256x256.gif?rev=3419908)
 * [Yoast SEO - Advanced SEO with real-time guidance and built-in AI](https://wordpress.org/plugins/wordpress-seo/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/wordpress-seo/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/wordpress-seo/)
 * [Active Topics](https://wordpress.org/support/plugin/wordpress-seo/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/wordpress-seo/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/wordpress-seo/reviews/)

## Tags

 * [cannot modify header](https://wordpress.org/support/topic-tag/cannot-modify-header/)

 * 5 replies
 * 4 participants
 * Last reply from: [Randy King](https://wordpress.org/support/users/randyking/)
 * Last activity: [13 years, 3 months ago](https://wordpress.org/support/topic/error-with-pluggablephp-cannot-modify-headers-info/#post-3432133)
 * Status: resolved