Title: Help!! Warning: Cannot modify header information
Last modified: August 22, 2016

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# Help!! Warning: Cannot modify header information

 *  [bimmlalala](https://wordpress.org/support/users/bimmlalala/)
 * (@bimmlalala)
 * [11 years, 4 months ago](https://wordpress.org/support/topic/help-warning-cannot-modify-header-information-1/)
 * I got this message at my wp login in page:
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home/adamphot/public_html/wp-content/themes/next/admin/class-tgm-plugin-activation.
   php:17) in /home/adamphot/public_html/wp-includes/pluggable.php on line 1121
 * what should i do?

Viewing 1 replies (of 1 total)

 *  [Josh Robbs](https://wordpress.org/support/users/jwrobbs/)
 * (@jwrobbs)
 * [11 years, 4 months ago](https://wordpress.org/support/topic/help-warning-cannot-modify-header-information-1/#post-5585878)
 * Have you modified anything recently? If you have, that’s where I’d start. It 
   is probably a plugin or your theme.
 * You should look at this article: [http://codex.wordpress.org/FAQ_Troubleshooting#How_do_I_solve_the_Headers_already_sent_warning_problem.3F](http://codex.wordpress.org/FAQ_Troubleshooting#How_do_I_solve_the_Headers_already_sent_warning_problem.3F)
 * If that doesn’t work:
 * It could be WordPress files. If that’s the case, you can download WordPress, 
   de-compress the file (unzip it), and upload the contents of the wp-admin folder
   over the old files.
 * For plugins, you can go through and rename their folder 1 at a time to try to
   find the culprit. (I’d just add an “X” to the front of their folder name in wp-
   contents/plugins.)

Viewing 1 replies (of 1 total)

The topic ‘Help!! Warning: Cannot modify header information’ is closed to new replies.

## Tags

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

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 1 reply
 * 2 participants
 * Last reply from: [Josh Robbs](https://wordpress.org/support/users/jwrobbs/)
 * Last activity: [11 years, 4 months ago](https://wordpress.org/support/topic/help-warning-cannot-modify-header-information-1/#post-5585878)
 * Status: not resolved

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