Title: Can;t activate or de-activate plugins
Last modified: August 19, 2016

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# Can;t activate or de-activate plugins

 *  Resolved [burnsy46](https://wordpress.org/support/users/burnsy46/)
 * (@burnsy46)
 * [18 years, 1 month ago](https://wordpress.org/support/topic/cant-activate-or-de-activate-plugins/)
 * I can’t activate or de-activate plugins. When I try I get this php error message.
 * Warning: Cannot modify header information – headers already sent by (output started
   at /wp-config.php:49) in /wp-includes/pluggable.php on line 331

Viewing 2 replies - 1 through 2 (of 2 total)

 *  [whooami](https://wordpress.org/support/users/whooami/)
 * (@whooami)
 * [18 years, 1 month ago](https://wordpress.org/support/topic/cant-activate-or-de-activate-plugins/#post-716052)
 * you have a blank line, or linebreaks in your wp-config.php **after** the closing`?
   >`
 *  Thread Starter [burnsy46](https://wordpress.org/support/users/burnsy46/)
 * (@burnsy46)
 * [18 years, 1 month ago](https://wordpress.org/support/topic/cant-activate-or-de-activate-plugins/#post-716072)
 * Hey thanks a lot for the speedy reply …
    **That worked!** Such a small thing,
   but it was actually preventing me from logging in as well … (whew)

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘Can;t activate or de-activate plugins’ is closed to new replies.

## Tags

 * [activate](https://wordpress.org/support/topic-tag/activate/)

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 2 replies
 * 2 participants
 * Last reply from: [burnsy46](https://wordpress.org/support/users/burnsy46/)
 * Last activity: [18 years, 1 month ago](https://wordpress.org/support/topic/cant-activate-or-de-activate-plugins/#post-716072)
 * Status: resolved

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