Title: Cannot modify header information
Last modified: June 20, 2023

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# Cannot modify header information

 *  Resolved [x777](https://wordpress.org/support/users/x777/)
 * (@x777)
 * [2 years, 11 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-188/)
 * Hi Pablo and all!
 * The plugin is awesome. I installed the plugin on multisites. But on one multisite
   with Budddy Press some small issue appears – after logging in a user see a bank
   screen with a word ‘maybe’ at the top left corner. After refreshing the page 
   the website works fine. The errors when debug mode is on:
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home/accountname/public_html/wp-content/plugins/wpm-user-sync/core/wpmus-
   functions.php:105) in /home/accountname/public_html/wp-includes/pluggable.php
   on line 1427
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home/accountname/public_html/wp-content/plugins/wpm-user-sync/core/wpmus-
   functions.php:105) in /home/accountname/public_html/wp-includes/pluggable.php
   on line 1430
 * Any ideas how to fix it?
   Many thanks!

Viewing 1 replies (of 1 total)

 *  Thread Starter [x777](https://wordpress.org/support/users/x777/)
 * (@x777)
 * [2 years, 11 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-188/#post-16833374)
 * Found a solution: just commented the line 105 and 106 in the file /public_html/
   wp-content/plugins/wpm-user-sync/core/wpmus-functions.php

Viewing 1 replies (of 1 total)

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

 * ![](https://ps.w.org/wpm-user-sync/assets/icon-256x256.png?rev=3523199)
 * [WPM User Sync](https://wordpress.org/plugins/wpm-user-sync/)
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## Tags

 * [Blank](https://wordpress.org/support/topic-tag/blank/)
 * [blank-screen](https://wordpress.org/support/topic-tag/blank-screen/)
 * [header information](https://wordpress.org/support/topic-tag/header-information/)
 * [pluggable](https://wordpress.org/support/topic-tag/pluggable/)
 * [white screen](https://wordpress.org/support/topic-tag/white-screen/)

 * 1 reply
 * 1 participant
 * Last reply from: [x777](https://wordpress.org/support/users/x777/)
 * Last activity: [2 years, 11 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-188/#post-16833374)
 * Status: resolved