Title: Warning: Cannot modify header information issues
Last modified: August 17, 2017

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# Warning: Cannot modify header information issues

 *  [MJ](https://wordpress.org/support/users/lioe/)
 * (@lioe)
 * [8 years, 10 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-issues/)
 * My last post on my website was about 3 weeks ago… just got around to trying to
   post again this past week and started getting this error:
    Warning: Cannot modify
   header information – headers already sent by (output started at /home2/livingi4/
   public_html/wp-content/themes/madhat/framework/customizer/_sanitization.php:1)
   in /home2/livingi4/public_html/wp-includes/pluggable.php on line 1210
 * It seems to be specifically tied to the MadHat theme as I’ve changed themes and
   no longer get the error, but I’m having a hard time finding another theme I like
   as well and would prefer to go back. I get the error when I try to preview a 
   post, add pictures, or edit pretty much anything.
 * Thanks!
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fwarning-cannot-modify-header-information-issues%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

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

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 * 0 replies
 * 1 participant
 * Last reply from: [MJ](https://wordpress.org/support/users/lioe/)
 * Last activity: [8 years, 10 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-issues/)
 * Status: not resolved