Title: RSS Feed problem
Last modified: August 21, 2016

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# RSS Feed problem

 *  [Richard](https://wordpress.org/support/users/richardahlin/)
 * (@richardahlin)
 * [12 years, 3 months ago](https://wordpress.org/support/topic/rss-feed-problem-51/)
 * Hi,
 * I’ve a problem with my rss feed – This is what I get when I try it:
    “Warning:
   call_user_func_array() [function.call-user-func-array]: First argument is expected
   to be a valid callback, ‘insertThumbnailRSS’ was given in /storage/content/91/
   149691/konservativt.se/public_html/wp-includes/plugin.php on line 199”
 * URL: [http://www.konservativt.se/](http://www.konservativt.se/)
 * Could someone help me with this?
 * Thanks in advance!

Viewing 3 replies - 1 through 3 (of 3 total)

 *  [kmessinger](https://wordpress.org/support/users/kmessinger/)
 * (@kmessinger)
 * [12 years, 3 months ago](https://wordpress.org/support/topic/rss-feed-problem-51/#post-4677978)
 * The plugin you are using, Insert RSS Thumbnails, comes with this warning
 * > This plugin hasn’t been updated in over 2 years. It may no longer be maintained
   > or supported and may have compatibility issues when used with more recent versions
   > of WordPress.
 *  Thread Starter [Richard](https://wordpress.org/support/users/richardahlin/)
 * (@richardahlin)
 * [12 years, 3 months ago](https://wordpress.org/support/topic/rss-feed-problem-51/#post-4677981)
 * Hi Kmessigner,
 * Thanks for your reply.
 * It’s not a problem with the plugin. I tried with the the default RSS reader as
   well and the problem was the same.
 * Regards,
    Richard
 *  [dmpinto](https://wordpress.org/support/users/dmpinto/)
 * (@dmpinto)
 * [12 years, 2 months ago](https://wordpress.org/support/topic/rss-feed-problem-51/#post-4678319)
 * Richard,
 * My solution for this same problem was found here:
    [http://wordpress.org/support/topic/plugin-wp-rss-aggregator-adding-a-thumbnail?replies=23](http://wordpress.org/support/topic/plugin-wp-rss-aggregator-adding-a-thumbnail?replies=23)
 * Specifically, you may need to append this code below to your functions.php in
   your /wp-content/themes folder. THIS IS UNDER THE ASSUMPTION YOU ARE USING A 
   CHILD THEME. If you are not, I highly recommend you create on as your themes 
   get overwritten when you upgrade WordPress and this ends up breaking all the 
   additional code you put in.
 *     ```
       function insertThumbnailRSS($content) {
       global $post;
       if ( has_post_thumbnail( $post->ID ) ){
       $content = '' . get_the_post_thumbnail( $post->ID, 'big-thumb' ) . '' . $content;
       }
       return $content;
       }
   
       add_filter('the_excerpt_rss', 'insertThumbnailRSS');
       add_filter('the_content_feed', 'insertThumbnailRSS');
       ```
   
 * Please be careful where which functions.php you append as well as there are several
   residing in wordpress and a duplication of this code will give you a different
   error.
 * Although, I’ve checked your feed and not see any issues with it at [http://www.konservativt.se/feed/](http://www.konservativt.se/feed/)
   so you may have already fixed the issue.
 * Good luck and let us know if this solved your problem.

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘RSS Feed problem’ is closed to new replies.

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 3 replies
 * 3 participants
 * Last reply from: [dmpinto](https://wordpress.org/support/users/dmpinto/)
 * Last activity: [12 years, 2 months ago](https://wordpress.org/support/topic/rss-feed-problem-51/#post-4678319)
 * Status: not resolved

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