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

---

# Cannot modify header information

 *  Resolved [brynergy](https://wordpress.org/support/users/brynergy/)
 * (@brynergy)
 * [18 years, 1 month ago](https://wordpress.org/support/topic/cannot-modify-header-information-9/)
 * I have recently updated to version 2.5.
 * Since then I have been getting this error when activating plugins:
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home/content/b/r/y/bryndan33/html/wp-config.php:47) in /home/content/b/r/
   y/bryndan33/html/wp-includes/pluggable.php on line 689

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

## Tags

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

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 0 replies
 * 1 participant
 * Last reply from: [brynergy](https://wordpress.org/support/users/brynergy/)
 * Last activity: [18 years, 1 month ago](https://wordpress.org/support/topic/cannot-modify-header-information-9/)
 * Status: resolved

## Topics

### Topics with no replies

### Non-support topics

### Resolved topics

### Unresolved topics

### All topics