Title: Error.Cannot modify header information
Last modified: September 29, 2020

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# Error.Cannot modify header information

 *  Resolved [ed777vs](https://wordpress.org/support/users/ed777vs/)
 * (@ed777vs)
 * [5 years, 8 months ago](https://wordpress.org/support/topic/error-cannot-modify-header-information-16/)
 * After installing woocommerce plugin I get this message: Warning: Cannot modify
   header information – headers already sent by (output started at /home/weddin72/
   public_html/www.miladaartdesign.com/wp-content/themes/Divi-4.4.6/includes/builder/
   frontend-builder/theme-builder/WoocommerceProductVariablePlaceholder.php:8) in/
   home/weddin72/public_html/www.miladaartdesign.com/wp-content/plugins/sg-cachepress/
   core/Supercacher/Supercacher_Helper.php on line 75
 * After deactivating, all goes back to normal.
 * How to fix this?

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

 *  Plugin Support [slash1andy](https://wordpress.org/support/users/slash1andy/)
 * (@slash1andy)
 * Automattic Happiness Engineer
 * [5 years, 8 months ago](https://wordpress.org/support/topic/error-cannot-modify-header-information-16/#post-13471393)
 * Hey there!
 * A few things:
 * This is not an error, it is a warning. The only reason you are seeing this is
   because your site has wp_debug turned on.
 * The message you are seeing is from the SiteGround cache plugin and your theme
   on your site and how they are interacting, nothing to do with WooCommerce.
 *  Thread Starter [ed777vs](https://wordpress.org/support/users/ed777vs/)
 * (@ed777vs)
 * [5 years, 8 months ago](https://wordpress.org/support/topic/error-cannot-modify-header-information-16/#post-13473921)
 * Thank you. I forwarded to Site-ground your reply and they sorted it out!

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

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

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## Tags

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

 * 2 replies
 * 2 participants
 * Last reply from: [ed777vs](https://wordpress.org/support/users/ed777vs/)
 * Last activity: [5 years, 8 months ago](https://wordpress.org/support/topic/error-cannot-modify-header-information-16/#post-13473921)
 * Status: resolved