Title: Fatal Error with Ninja Forms
Last modified: February 6, 2018

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# Fatal Error with Ninja Forms

 *  [Noah Hearle](https://wordpress.org/support/users/designextreme/)
 * (@designextreme)
 * [8 years, 2 months ago](https://wordpress.org/support/topic/fatal-error-with-ninja-forms/)
 * Just to let you know there is a conflict with Ninja Forms:
 * `Fatal error: Cannot redeclare wp_session_cache_expire() (previously declared
   in /wp-content/plugins/ninja-forms/deprecated/includes/libraries/wp-session.php:
   22) in /wp-content/plugins/wp-session-manager/includes/deprecated.php on line
   20`
 * I am not sure if this is something that could be resolved with your plugin or
   theirs, but it’s better to be aware of this issue. When both plugins are running
   it takes down the site.

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

 *  Plugin Author [Eric Mann](https://wordpress.org/support/users/ericmann/)
 * (@ericmann)
 * [8 years, 2 months ago](https://wordpress.org/support/topic/fatal-error-with-ninja-forms/#post-9974648)
 * This is what happens when people copy-paste someone else’s code into their own
   projects. Sadly this <i>isn’t</i> something I can correct in my own plugin as
   the functionality of `wp_session_cache_expire()` has drastically changed and 
   I can’t fall back to the old version.
 * I’d recommend pining Ninja Forms directly (and will try to follow up with them
   myself when I get a chance).
 *  [Friese](https://wordpress.org/support/users/friese/)
 * (@friese)
 * [7 years, 11 months ago](https://wordpress.org/support/topic/fatal-error-with-ninja-forms/#post-10254472)
 * Please see also discussion on [Ninja Forms’ GitHub page](https://github.com/wpninjas/ninja-forms/issues/3175).

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

The topic ‘Fatal Error with Ninja Forms’ is closed to new replies.

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## Tags

 * [fatal](https://wordpress.org/support/topic-tag/fatal/)
 * [fatal error](https://wordpress.org/support/topic-tag/fatal-error/)
 * [redeclare](https://wordpress.org/support/topic-tag/redeclare/)

 * 2 replies
 * 3 participants
 * Last reply from: [Friese](https://wordpress.org/support/users/friese/)
 * Last activity: [7 years, 11 months ago](https://wordpress.org/support/topic/fatal-error-with-ninja-forms/#post-10254472)
 * Status: not a support question