Title: "Cannot modify header information" Error Last modified: August 30, 2016 --- # "Cannot modify header information" Error * Resolved [happymix](https://wordpress.org/support/users/happymix/) * (@happymix) * [10 years, 7 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-error-13/) * When I try to activate this plugin I get this error: * “Warning: Cannot modify header information – headers already sent by (output started at /home/…/public_html/wp-includes/rewrite.php:1) in /home/…/public_html/ wp-includes/pluggable.php on line 1207” * Any ideas on what could be wrong? Thanks! * [https://wordpress.org/plugins/wp-google-maps/](https://wordpress.org/plugins/wp-google-maps/) Viewing 1 replies (of 1 total) * Plugin Author [WPGMaps](https://wordpress.org/support/users/wpgmaps/) * (@wpgmaps) * [10 years, 7 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-error-13/#post-6741402) * Hi there. * Please advise what version of the plugin you are using? What version of WordPress are you currently using? Viewing 1 replies (of 1 total) The topic ‘"Cannot modify header information" Error’ is closed to new replies. * ![](https://ps.w.org/wp-google-maps/assets/icon-256x256.png?rev=3058363) * [WP Go Maps - Google Maps, OpenStreetMap, Leaflet Map](https://wordpress.org/plugins/wp-google-maps/) * [Frequently Asked Questions](https://wordpress.org/plugins/wp-google-maps/#faq) * [Support Threads](https://wordpress.org/support/plugin/wp-google-maps/) * [Active Topics](https://wordpress.org/support/plugin/wp-google-maps/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/wp-google-maps/unresolved/) * [Reviews](https://wordpress.org/support/plugin/wp-google-maps/reviews/) * 1 reply * 2 participants * Last reply from: [WPGMaps](https://wordpress.org/support/users/wpgmaps/) * Last activity: [10 years, 7 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-error-13/#post-6741402) * Status: resolved