Title: Cannot modify header information
Last modified: August 31, 2016

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# Cannot modify header information

 *  Resolved [pgDarkness](https://wordpress.org/support/users/pgdarkness/)
 * (@pgdarkness)
 * [10 years, 5 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-115/)
 * Hi, I recently start having a problem when I try to submit any change in My WP
   Dashboard while having this plugin activated. The error message says :
    Warning:
   Cannot modify header information – headers already sent by (output started at/
   home/***/domains/***/public_html/wp-content/plugins/telegram-bot/custom-post-
   types.php:541) in /home/***/domains/***/public_html/wp-includes/pluggable.php
   on line 1228
 * Please guide me through the process to narrow down the problem and fix it.
    Thanks
   in advance.
 * [https://wordpress.org/plugins/telegram-bot/](https://wordpress.org/plugins/telegram-bot/)

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

 *  Plugin Author [Marco Milesi](https://wordpress.org/support/users/milmor/)
 * (@milmor)
 * [10 years, 5 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-115/#post-6917163)
 * Hi,
    are you using WP_Debug? Does this happen with latest version?
 *  Thread Starter [pgDarkness](https://wordpress.org/support/users/pgdarkness/)
 * (@pgdarkness)
 * [10 years, 5 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-115/#post-6917287)
 * No and no.
    It was happening for atleast two updates of wordpress as far as I
   can remember. It started happening since you updated version 1.0, but I’m not
   sure exactly. I wasn’t worry and guessed it would get fixed in later updates.
   I look a little bit more into it and find out Its not an interference with my
   plugins and theme.
 * When the error happenes, the changes do apply but page changes to that error 
   message. And I need to go back and refresh the page to see the changes.
 *  Thread Starter [pgDarkness](https://wordpress.org/support/users/pgdarkness/)
 * (@pgdarkness)
 * [10 years, 5 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-115/#post-6917323)
 * I don’t know what caused it and I don’t know how it got fixed but I think its
   gone.
    OK, here is what I did : After the latest plugin update (1.3), I couldn’t
   update the plugin using dashboard, so I deleted the plugin and installed it manually
   through ftp.
 * If at anytime, the error happens again, I will report back to this thread.

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

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

 * ![](https://ps.w.org/telegram-bot/assets/icon-256x256.png?rev=2981438)
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 * 3 replies
 * 2 participants
 * Last reply from: [pgDarkness](https://wordpress.org/support/users/pgdarkness/)
 * Last activity: [10 years, 5 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-115/#post-6917323)
 * Status: resolved