Title: PHP Warning:  require_once
Last modified: August 20, 2016

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# PHP Warning: require_once

 *  [chatchat](https://wordpress.org/support/users/chatchat/)
 * (@chatchat)
 * [13 years, 3 months ago](https://wordpress.org/support/topic/php-warning-require_once/)
 * Hello,
 * Since last version i have a 500 error on all admin pages.
    If i watch the log
   file i can see : 2013/02/07 18:30:40 [error] 2480#0: *6404115 FastCGI sent in
   stderr: “PHP message: PHP Warning: require_once(includes/facebook-php-sdk/class-
   facebook-wp.php): failed to open stream: No such file or directory in /home/***/
   www/wp-content/plugins/facebook/admin/settings-app.php on line 275 PHP message:
   PHP Fatal error: require_once(): Failed opening required ‘includes/facebook-php-
   sdk/class-facebook-wp.php’ (include_path=’.:/usr/share/pear:/usr/share/php’) 
   in /home/cosmeblo/www/wp-content/plugins/facebook/admin/settings-app.php on line
   275″ while reading response header from upstream, …
 * Do i need to install some more things ?
 * Thanks
 * [http://wordpress.org/extend/plugins/facebook/](http://wordpress.org/extend/plugins/facebook/)

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

 *  Plugin Contributor [Niall Kennedy](https://wordpress.org/support/users/niallkennedy/)
 * (@niallkennedy)
 * [13 years, 3 months ago](https://wordpress.org/support/topic/php-warning-require_once/#post-3446929)
 * I believe this is a problem with migrating your settings. I have committed a 
   code change that will go into effect with the next release.
 * Which version of the plugin was installed before updating?
 *  Thread Starter [chatchat](https://wordpress.org/support/users/chatchat/)
 * (@chatchat)
 * [13 years, 3 months ago](https://wordpress.org/support/topic/php-warning-require_once/#post-3446941)
 * I’m sorry but i don’t know now what was the previous version 🙁

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

The topic ‘PHP Warning: require_once’ is closed to new replies.

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 * 2 replies
 * 2 participants
 * Last reply from: [chatchat](https://wordpress.org/support/users/chatchat/)
 * Last activity: [13 years, 3 months ago](https://wordpress.org/support/topic/php-warning-require_once/#post-3446941)
 * Status: not resolved