Title: Cannot activate plugin. Shows Warning !!!
Last modified: August 20, 2016

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# Cannot activate plugin. Shows Warning !!!

 *  [amish2332](https://wordpress.org/support/users/amish2332/)
 * (@amish2332)
 * [13 years, 6 months ago](https://wordpress.org/support/topic/cannot-activate-plugin-shows-warning/)
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home/amishmha/public_html/wp-includes/wp-db.php:990) in /home/amishmha/public_html/
   wp-includes/pluggable.php on line 876
 * The above is the warning which I get when I go for activating a plugin.

Viewing 5 replies - 1 through 5 (of 5 total)

 *  [tomontoast](https://wordpress.org/support/users/tomontoast/)
 * (@tomontoast)
 * [13 years, 6 months ago](https://wordpress.org/support/topic/cannot-activate-plugin-shows-warning/#post-3270767)
 * There is probably an error with the plugin. It is probably trying to send out
   header information at the wrong point. Try activating a different plugin and 
   see if you get the same result.
 *  Thread Starter [amish2332](https://wordpress.org/support/users/amish2332/)
 * (@amish2332)
 * [13 years, 6 months ago](https://wordpress.org/support/topic/cannot-activate-plugin-shows-warning/#post-3270775)
 * Hey Tomontoast,
 * Thanks for your quick reply.
 * I tried other plugins but still its showing warning but this time I noticed that
   when I activate plugin I get the above warning and when I reach to plugin page
   on dashboard I can already see plugin activated.
 *  [tomontoast](https://wordpress.org/support/users/tomontoast/)
 * (@tomontoast)
 * [13 years, 6 months ago](https://wordpress.org/support/topic/cannot-activate-plugin-shows-warning/#post-3270781)
 * I can’t work out why this is occurring. What version of wordpress are you using?
 *  Thread Starter [amish2332](https://wordpress.org/support/users/amish2332/)
 * (@amish2332)
 * [13 years, 6 months ago](https://wordpress.org/support/topic/cannot-activate-plugin-shows-warning/#post-3270792)
 * Its WordPress 3.5 the latest one. Updated just few hours ago.
 *  [esmi](https://wordpress.org/support/users/esmi/)
 * (@esmi)
 * [13 years, 6 months ago](https://wordpress.org/support/topic/cannot-activate-plugin-shows-warning/#post-3270794)
 * Try re-uploading all files & folders – **except** the wp-content folder – from
   a **fresh** download of WordPress. Make sure that you delete the old copies of
   files & folder before uploading the new ones. You may have a corrupt file.

Viewing 5 replies - 1 through 5 (of 5 total)

The topic ‘Cannot activate plugin. Shows Warning !!!’ 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/)
 * 5 replies
 * 3 participants
 * Last reply from: [esmi](https://wordpress.org/support/users/esmi/)
 * Last activity: [13 years, 6 months ago](https://wordpress.org/support/topic/cannot-activate-plugin-shows-warning/#post-3270794)
 * Status: not resolved

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