Title: Error Message: Cannot modify header information
Last modified: August 20, 2016

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# Error Message: Cannot modify header information

 *  [nobodymove](https://wordpress.org/support/users/nobodymove/)
 * (@nobodymove)
 * [13 years, 3 months ago](https://wordpress.org/support/topic/error-message-cannot-modify-header-information/)
 * Hello, I’m using:
 * wp version 3.5.1
    seo plugin version 1.3.4.4
 * I’m currently using the Zenon Lite Theme.
 * I am receiving the following error message.
 * Error Message:
 * Warning: Cannot modify header information – headers already sent by (output started
   at D:\Hosting\2930673\html\wordpress\wp-includes\script-loader.php:710) inD:\
   Hosting\2930673\html\wordpress\wp-includes\pluggable.php on line 876
 * The plugin still installs and seems fine, but when I go to edit a page, the drop
   down window is unresponsive, it will not expand to offer the programing options.
 * Any ideas what the problem might be?
 * [http://wordpress.org/extend/plugins/wordpress-seo/](http://wordpress.org/extend/plugins/wordpress-seo/)

The topic ‘Error Message: Cannot modify header information’ is closed to new replies.

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 * 0 replies
 * 1 participant
 * Last reply from: [nobodymove](https://wordpress.org/support/users/nobodymove/)
 * Last activity: [13 years, 3 months ago](https://wordpress.org/support/topic/error-message-cannot-modify-header-information/)
 * Status: not resolved