Title: Warning message when installing plugin
Last modified: August 20, 2016

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# Warning message when installing plugin

 *  [LoriRowland](https://wordpress.org/support/users/lorirowland/)
 * (@lorirowland)
 * [13 years ago](https://wordpress.org/support/topic/warning-message-when-installing-plugin/)
 * When activating WordPress SEO by Yoast, I get the following message:
 * The plugin generated 306 characters of unexpected output during activation. If
   you notice “headers already sent” messages, problems with syndication feeds or
   other issues, try deactivating or removing this plugin.
 * Thank you!

The topic ‘Warning message when installing plugin’ is closed to new replies.

## Tags

 * [headers already sent](https://wordpress.org/support/topic-tag/headers-already-sent/)

 * 0 replies
 * 1 participant
 * Last reply from: [LoriRowland](https://wordpress.org/support/users/lorirowland/)
 * Last activity: [13 years ago](https://wordpress.org/support/topic/warning-message-when-installing-plugin/)
 * Status: not resolved

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