Title: Installation Error?
Last modified: August 20, 2016

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# Installation Error?

 *  [Roxybc](https://wordpress.org/support/users/roxybc/)
 * (@roxybc)
 * [13 years, 2 months ago](https://wordpress.org/support/topic/installation-error-60/)
 * **WordPress version:** 3.5.1
 * **WordPress SEO version: **Most recent version of Yoast
 * **I did this:** I deactivated the All in One SEO Pack and installed and activated
   Yoast. Immediately after installing and activating the plugin I received the 
   following error message:
 * **“Warning: Cannot modify header information – headers already sent by (output
   started at /home/roxybc/public_html/unbecomingmymother.com/wp-admin/includes/
   template.php:1642) in /home/roxybc/public_html/unbecomingmymother.com/wp-includes/
   pluggable.php on line 876”**
 * It seems like others have received this error message as well, but as per the
   moderators comments I have started my own thread.
 * I am using the most recent version of the Atahualapha theme.
 * **I expected the plugin to do this:** Install smoothly and work
 * **Instead it did this: **Gave me an error message so don’t know if it’s working
   correctly.
 * I opened another tab and opened my WP dashboard again and then received this 
   message, so don’t know if anything is actually wrong or not.
 * **“You’ve just installed WordPress SEO by Yoast! Click “Start Tour” to view a
   quick introduction of this plugins core functionality.”**
 * [http://wordpress.org/extend/plugins/wordpress-seo/](http://wordpress.org/extend/plugins/wordpress-seo/)

The topic ‘Installation Error?’ is closed to new replies.

 * ![](https://ps.w.org/wordpress-seo/assets/icon-256x256.gif?rev=3419908)
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 * [Frequently Asked Questions](https://wordpress.org/plugins/wordpress-seo/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/wordpress-seo/)
 * [Active Topics](https://wordpress.org/support/plugin/wordpress-seo/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/wordpress-seo/unresolved/)
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## Tags

 * [instalation](https://wordpress.org/support/topic-tag/instalation/)
 * [Yoast](https://wordpress.org/support/topic-tag/yoast/)

 * 0 replies
 * 1 participant
 * Last reply from: [Roxybc](https://wordpress.org/support/users/roxybc/)
 * Last activity: [13 years, 2 months ago](https://wordpress.org/support/topic/installation-error-60/)
 * Status: not resolved