Title: error message: "Cannot modify header information – headers already sent"
Last modified: August 30, 2016

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# error message: "Cannot modify header information – headers already sent"

 *  [ejm](https://wordpress.org/support/users/llizard/)
 * (@llizard)
 * [11 years ago](https://wordpress.org/support/topic/error-message-cannot-modify-header-information-headers-already-sent/)
 * We are setting up a new site (not yet live so it cannot be viewed) and have the
   latest version (7.5) of wordpress.org/plugins/font/ installed.
 * In the WP dashboard, when going to “Appearance – Header” the following error 
   message appears very briefly before loading the page normally:
 * > Warning: Cannot modify header information – headers already sent by (output
   > started at /wp-content/plugins/font/Font.php:763) in /wp-includes/option.php
   > on line 772
 * How do we fix Font.php in order to stop this conflict?
 * Thank you.
 * [https://wordpress.org/plugins/font/](https://wordpress.org/plugins/font/)

The topic ‘error message: "Cannot modify header information – headers already sent"’
is closed to new replies.

 * ![](https://s.w.org/plugins/geopattern-icon/font_e3cee3.svg)
 * [Font - official webfonts plugin of Fonts For Web. NO CODING! Just click & change font size, color and font face visually!](https://wordpress.org/plugins/font/)
 * [Support Threads](https://wordpress.org/support/plugin/font/)
 * [Active Topics](https://wordpress.org/support/plugin/font/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/font/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/font/reviews/)

## Tags

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

 * 0 replies
 * 1 participant
 * Last reply from: [ejm](https://wordpress.org/support/users/llizard/)
 * Last activity: [11 years ago](https://wordpress.org/support/topic/error-message-cannot-modify-header-information-headers-already-sent/)
 * Status: not resolved