Title: Error – Cannot modify header information
Last modified: February 16, 2018

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# Error – Cannot modify header information

 *  Resolved [arekko](https://wordpress.org/support/users/arekko/)
 * (@arekko)
 * [8 years, 1 month ago](https://wordpress.org/support/topic/error-cannot-modify-header-information-13/)
 * On widget page customize (/wp-admin/widgets.php) plugin display error:
 * Warning: Cannot modify header information – headers already sent by (output started
   at …/public_html/wp-content/plugins/widget-countdown/includes/widget.php:394)
   in…/public_html/wp-admin/includes/misc.php on line 1114
 * Please inform me, it is a bug or what? What I can solve a problem? If I switch
   off plugin the error not displaying.

Viewing 3 replies - 1 through 3 (of 3 total)

 *  Plugin Author [wpdevart](https://wordpress.org/support/users/wpdevart/)
 * (@wpdevart)
 * [8 years, 1 month ago](https://wordpress.org/support/topic/error-cannot-modify-header-information-13/#post-9982597)
 * Hi dear user.
 * We will check it from our side and then let you know about results.
 * Thanks.
 *  Thread Starter [arekko](https://wordpress.org/support/users/arekko/)
 * (@arekko)
 * [8 years, 1 month ago](https://wordpress.org/support/topic/error-cannot-modify-header-information-13/#post-9984761)
 * After consult with WpDevArt support team:
 * The issue comes from this file – widget-countdown/includes/widget.php. Find this
   file from our plugin folder and edit it.
 * Find this part of code(387-395 lines) and remove it –
 * $pagenow;
    if( $pagenow == ‘widgets.php’) { echo ‘ <style> .pro_feature{ font-
   style:italic; } </style>’; }
 * This fix the issue.
    Thanks.
 *  Plugin Author [wpdevart](https://wordpress.org/support/users/wpdevart/)
 * (@wpdevart)
 * [8 years, 1 month ago](https://wordpress.org/support/topic/error-cannot-modify-header-information-13/#post-10003788)
 * Hi dear user.
 * We are going to close this topic, if you have other issues, then let us know.
 * Thanks.

Viewing 3 replies - 1 through 3 (of 3 total)

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

 * ![](https://ps.w.org/widget-countdown/assets/icon-128x128.png?rev=1155844)
 * [Countdown Timer - Widget Countdown](https://wordpress.org/plugins/widget-countdown/)
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 * [Unresolved Topics](https://wordpress.org/support/plugin/widget-countdown/unresolved/)
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## Tags

 * [one line](https://wordpress.org/support/topic-tag/one-line/)
 * [seconds](https://wordpress.org/support/topic-tag/seconds/)
 * [widget](https://wordpress.org/support/topic-tag/widget/)

 * 3 replies
 * 2 participants
 * Last reply from: [wpdevart](https://wordpress.org/support/users/wpdevart/)
 * Last activity: [8 years, 1 month ago](https://wordpress.org/support/topic/error-cannot-modify-header-information-13/#post-10003788)
 * Status: resolved