Title: RSS Validation Error using Yoast SEO and Magic Fields Plugins
Last modified: August 20, 2016

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# RSS Validation Error using Yoast SEO and Magic Fields Plugins

 *  [keith1000](https://wordpress.org/support/users/keith1000/)
 * (@keith1000)
 * [13 years, 2 months ago](https://wordpress.org/support/topic/rss-validation-error-using-yoast-seo-and-magic-fields-plugins/)
 * Two great plugins, but something is not working right.
 * These Plugins or combination of these plugin results in an error in the RSS feed:-
 * Cannot modify header information – headers already sent by
 * WordPress version 3.5.1
    Magic Fields Plugin Version 2.1 ( www/http://magicfields.
   org/ ) WordPress SEO By Joost De Valk Version 1.3.4.4 ([http://yoast.com/wordpress/seo/](http://yoast.com/wordpress/seo/))
 * Background Information
    The problem occurred on the website [http://www.maitebaron.com](http://www.maitebaron.com),
   the RSS feed having this error. The error can be checked by using the W3C Feed
   Validation Service [http://validator.w3.org/](http://validator.w3.org/)
 * enter the URL [http://www.maitebaron.com/feed](http://www.maitebaron.com/feed)
 * A copy of this website has been installed in the following URL
 * [http://beyondcorporatenow.com/](http://beyondcorporatenow.com/)
 * This just being a spare url I can use for some testing.
 * The custom theme that was used in the original website has been removed and the
   theme has been set back to the default 2010 WordPress theme.
 * The website looks a complete mess, but is essentially functional.
    All Plugins
   apart for the Magic Fields and The WordPress SEO have been removed.
 * All magic fields have been removed. So the installation in [http://www.beyondcorporatenow.com](http://www.beyondcorporatenow.com)
   has been reduced to the bare bones.
 * If either plugin is deactivated the RSS validation error goes away.
    Use the 
   w3C validator with [http://www.beyondcorporatenow.com](http://www.beyondcorporatenow.com)
   is the error condition.
 * Anyone any insight into how I can resolve this issue ?

The topic ‘RSS Validation Error using Yoast SEO and Magic Fields Plugins’ is closed
to new replies.

## Tags

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

 * 0 replies
 * 1 participant
 * Last reply from: [keith1000](https://wordpress.org/support/users/keith1000/)
 * Last activity: [13 years, 2 months ago](https://wordpress.org/support/topic/rss-validation-error-using-yoast-seo-and-magic-fields-plugins/)
 * Status: not resolved

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