Title: Problem since upgrading plugins
Last modified: August 20, 2016

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# Problem since upgrading plugins

 *  [johninuk](https://wordpress.org/support/users/johninuk/)
 * (@johninuk)
 * [13 years, 2 months ago](https://wordpress.org/support/topic/problem-since-upgrading-plugins/)
 * Have update some of the plugins and now get the following message when trying
   to log out of the site :- Warning: call_user_func_array() expects parameter 1
   to be a valid callback, class ‘deprecatedSL’ does not have a method ‘log_file’
   in /home/s16edin/public_html/wordpress/wp-includes/plugin.php on line 403
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home/s16edin/public_html/wordpress/wp-includes/plugin.php:403) in /home/s16edin/
   public_html/wordpress/wp-login.php on line 362
 * Followed by further warnings about other lines that cannot modify header.
 * How can I resolve this?

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

 *  [esmi](https://wordpress.org/support/users/esmi/)
 * (@esmi)
 * [13 years, 2 months ago](https://wordpress.org/support/topic/problem-since-upgrading-plugins/#post-3348893)
 * Deactivate all plugins.
 *  Thread Starter [johninuk](https://wordpress.org/support/users/johninuk/)
 * (@johninuk)
 * [13 years, 2 months ago](https://wordpress.org/support/topic/problem-since-upgrading-plugins/#post-3349074)
 * Tried to login to site to deactivate plugins but cannot login getting the following
   message:-
 * Warning: call_user_func_array() expects parameter 1 to be a valid callback, class‘
   deprecatedSL’ does not have a method ‘log_file’ in /home/s16edin/public_html/
   wordpress/wp-includes/plugin.php on line 403
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home/s16edin/public_html/wordpress/wp-includes/plugin.php:403) in /home/s16edin/
   public_html/wordpress/wp-login.php on line 362

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

The topic ‘Problem since upgrading plugins’ is closed to new replies.

## Tags

 * [error message](https://wordpress.org/support/topic-tag/error-message/)
 * [php-error](https://wordpress.org/support/topic-tag/php-error/)
 * [updating plugins](https://wordpress.org/support/topic-tag/updating-plugins/)

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 2 replies
 * 2 participants
 * Last reply from: [johninuk](https://wordpress.org/support/users/johninuk/)
 * Last activity: [13 years, 2 months ago](https://wordpress.org/support/topic/problem-since-upgrading-plugins/#post-3349074)
 * Status: not resolved

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