Title: Cannot modify header error
Last modified: September 22, 2016

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# Cannot modify header error

 *  [Venutius](https://wordpress.org/support/users/venutius/)
 * (@venutius)
 * [9 years, 8 months ago](https://wordpress.org/support/topic/cannot-modify-header-error-9/)
 * I’m getting the following error messages on my front end
 * Warning: Cannot modify header information – headers already sent by (output started
   at /wp-content/themes/graphene/header.php:12) in /wp-includes/rest-api.php on
   line 359
 * Warning: Cannot modify header information – headers already sent by (output started
   at /wp-content/themes/graphene/header.php:12) in /wp-includes/rest-api.php on
   line 359
 * Warning: Cannot modify header information – headers already sent by (output started
   at /wp-content/themes/graphene/header.php:12) in /wp-includes/rest-api.php on
   line 359

The topic ‘Cannot modify header error’ is closed to new replies.

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 * 0 replies
 * 1 participant
 * Last reply from: [Venutius](https://wordpress.org/support/users/venutius/)
 * Last activity: [9 years, 8 months ago](https://wordpress.org/support/topic/cannot-modify-header-error-9/)
 * Status: not resolved