Title: Errors adding contributors in admin
Last modified: August 21, 2016

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# Errors adding contributors in admin

 *  [waffenss](https://wordpress.org/support/users/waffenss/)
 * (@waffenss)
 * [12 years, 5 months ago](https://wordpress.org/support/topic/errors-adding-contributors-in-admin/)
 * Not sure why but testing contributor and author setup I am getting errors in 
   upper part of admin panel when logged in testing.
 * Warning: call_user_func() [function.call-user-func]: First argument is expected
   to be a valid callback in /home/username/public_html/wp-includes/functions.php
   on line 2117
 * Warning: call_user_func() [function.call-user-func]: First argument is expected
   to be a valid callback in /home/username/public_html/wp-includes/functions.php
   on line 2117
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home/username/public_html/wp-includes/functions.php:2117) in /home/username/
   public_html/wp-includes/option.php on line 563
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home/username/public_html/wp-includes/functions.php:2117) in /home/username/
   public_html/wp-includes/option.php on line 564
 * Warning: include(/home/username/public_html/wp-content/plugins/sharing) [function.
   include]: failed to open stream: No such file or directory in /home/username/
   public_html/wp-admin/admin.php on line 245
 * Warning: include() [function.include]: Failed opening ‘/home/username/public_html/
   wp-content/plugins/sharing’ for inclusion (include_path=’.:/usr/lib/php:/usr/
   local/lib/php’) in /home/username/public_html/wp-admin/admin.php on line 245
 * There has not been one error before testing this on any versions of my install
   or upgrades. I have been the only author and it is time for help but just discovered
   this and need some insight on what is causing it?
 * I took out my name and replaced with home/username/

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Thread Starter [waffenss](https://wordpress.org/support/users/waffenss/)
 * (@waffenss)
 * [12 years, 5 months ago](https://wordpress.org/support/topic/errors-adding-contributors-in-admin/#post-4436758)
 * Also received this error deleting a test contributor post
 * Warning: call_user_func() [function.call-user-func]: First argument is expected
   to be a valid callback in /home/username/public_html/wp-includes/functions.php
   on line 2117
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home/username/public_html/wp-includes/functions.php:2117) in /home/username/
   public_html/wp-includes/pluggable.php on line 896
 *  Thread Starter [waffenss](https://wordpress.org/support/users/waffenss/)
 * (@waffenss)
 * [12 years, 5 months ago](https://wordpress.org/support/topic/errors-adding-contributors-in-admin/#post-4436795)
 * Manual fresh install = Still same errors
 * Admin panel re-install = Still same errors
 * Must be bad core code / bug what else would cause this?
 * **And this makes absolutely no sense at all there is no
    (/home/username/public_html/
   wp-content/plugins/sharing)
 * Unless Jetpack is doing this with the linked accounts available to all authors/
   contributors?
 * Warning: include(/home/username/public_html/wp-content/plugins/sharing) [function.
   include]: failed to open stream: No such file or directory in /home/username/
   public_html/wp-admin/admin.php on line 245

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘Errors adding contributors in admin’ is closed to new replies.

## Tags

 * [Admin-Area](https://wordpress.org/support/topic-tag/admin-area/)

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 2 replies
 * 1 participant
 * Last reply from: [waffenss](https://wordpress.org/support/users/waffenss/)
 * Last activity: [12 years, 5 months ago](https://wordpress.org/support/topic/errors-adding-contributors-in-admin/#post-4436795)
 * Status: not resolved

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