Title: Error message: Warning: Cannot modify header information – headers already sent
Last modified: October 6, 2017

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# Error message: Warning: Cannot modify header information – headers already sent

 *  [eviewang](https://wordpress.org/support/users/eviewang/)
 * (@eviewang)
 * [8 years, 8 months ago](https://wordpress.org/support/topic/error-message-warning-cannot-modify-header-information-headers-already-sent/)
 * I receive this error message when I want to log-in to my admin panel
    Warning:
   Cannot modify header information – headers already sent by (output started at/
   nfs/c12/h07/mnt/218474/domains/pearl.drof.co/html/wp-content/plugins/duplicate-
   wp-page-post/duplicate-wp-page-post.php:2) in /nfs/c12/h07/mnt/218474/domains/
   pearl.drof.co/html/wp-login.php on line 396
 * Since now I cannot even log into my admin page, what should I do now to gain 
   access again?

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

 *  [Mikko Saari](https://wordpress.org/support/users/msaari/)
 * (@msaari)
 * [8 years, 8 months ago](https://wordpress.org/support/topic/error-message-warning-cannot-modify-header-information-headers-already-sent/#post-9572680)
 * There’s an empty line in top of the file `/wp-content/plugins/duplicate-wp-page-
   post/duplicate-wp-page-post.php`. Remove the empty line (or disable this plugin)
   to fix the issue.
 *  Plugin Author [Arjun Thakur](https://wordpress.org/support/users/arjunthakur/)
 * (@arjunthakur)
 * [8 years, 6 months ago](https://wordpress.org/support/topic/error-message-warning-cannot-modify-header-information-headers-already-sent/#post-9759782)
 * Please update the plugin, I have fixed the issues.

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

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

 * ![](https://ps.w.org/duplicate-wp-page-post/assets/icon-128x128.png?rev=1572300)
 * [Duplicate Page and Post](https://wordpress.org/plugins/duplicate-wp-page-post/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/duplicate-wp-page-post/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/duplicate-wp-page-post/)
 * [Active Topics](https://wordpress.org/support/plugin/duplicate-wp-page-post/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/duplicate-wp-page-post/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/duplicate-wp-page-post/reviews/)

 * 2 replies
 * 3 participants
 * Last reply from: [Arjun Thakur](https://wordpress.org/support/users/arjunthakur/)
 * Last activity: [8 years, 6 months ago](https://wordpress.org/support/topic/error-message-warning-cannot-modify-header-information-headers-already-sent/#post-9759782)
 * Status: not resolved