Title: Causing problems with post.php
Last modified: April 9, 2018

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# Causing problems with post.php

 *  [poetcsw](https://wordpress.org/support/users/poetcsw/)
 * (@poetcsw)
 * [8 years, 2 months ago](https://wordpress.org/support/topic/causing-problems-with-post-php/)
 * When the libsyn plug-in is enabled, I receive the following messages:
 * Undefined index: meta_link in ….. wp-content…/admin/lib/Libsyn/Post.php on line
   73.
 * Removing libsyn allows me to edit posts and media library contents again. Activate
   the plug-in and post fails with a series of “array_merge()” and “Cannot modify
   header” errors.
 * The problem is definitely within libsyn based on the console report.
 * Thank you.

The topic ‘Causing problems with post.php’ is closed to new replies.

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## Tags

 * [array_merge](https://wordpress.org/support/topic-tag/array_merge/)
 * [undefined index](https://wordpress.org/support/topic-tag/undefined-index/)

 * 0 replies
 * 1 participant
 * Last reply from: [poetcsw](https://wordpress.org/support/users/poetcsw/)
 * Last activity: [8 years, 2 months ago](https://wordpress.org/support/topic/causing-problems-with-post-php/)
 * Status: not resolved