Title: Cannot modify header information
Last modified: August 19, 2016

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# Cannot modify header information

 *  [robert85](https://wordpress.org/support/users/robert85/)
 * (@robert85)
 * [17 years, 1 month ago](https://wordpress.org/support/topic/cannot-modify-header-information-22/)
 * I keep getting this error when I try to login using any other browser except 
   Firefox(on firefox I can autheticate). In Firefox I’m getting this error when
   I try to publish enything or, modify settings, etc.
 * The problem appeared from nowhere cause the day before everything worked perfectly…
   Thanks
 * Cannot modify header information – headers already sent by (output started at……../
   wp-includes/default-filters.php:204) in ……../wp-includes/pluggable.php on line
   850

Viewing 1 replies (of 1 total)

 *  [Samuel B](https://wordpress.org/support/users/samboll/)
 * (@samboll)
 * [17 years, 1 month ago](https://wordpress.org/support/topic/cannot-modify-header-information-22/#post-1041085)
 * [http://codex.wordpress.org/Answers-Troubleshooting#Headers_already_sent](http://codex.wordpress.org/Answers-Troubleshooting#Headers_already_sent)
 * did you just install a plugin by any chance?

Viewing 1 replies (of 1 total)

The topic ‘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: [Samuel B](https://wordpress.org/support/users/samboll/)
 * Last activity: [17 years, 1 month ago](https://wordpress.org/support/topic/cannot-modify-header-information-22/#post-1041085)
 * Status: not resolved

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