Title: Fatal error when using plugin duplicator Last modified: April 27, 2020 --- # Fatal error when using plugin duplicator * Resolved [eysiox](https://wordpress.org/support/users/eysiox/) * (@eysiox) * [6 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-when-using-plugin-duplicator-2/) * Hello, I use WordPress with FreeNas 11.3U2 I installed wordpress and the duplicator plugin when I try to create a package I get an error message * Error:[https://zupimages.net/viewer.php?id=20/17/8bhq.png](https://zupimages.net/viewer.php?id=20/17/8bhq.png) Viewing 11 replies - 1 through 11 (of 11 total) * [Cory Lamle](https://wordpress.org/support/users/corylamleorg/) * (@corylamleorg) * [6 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-when-using-plugin-duplicator-2/#post-12741166) * Hey [@eysiox](https://wordpress.org/support/users/eysiox/), * The function [filter_var](https://www.php.net/manual/en/function.filter-var.php) is a built-in PHP function. I would contact your host or server admin and ask them whey they don’t support the built-in PHP function. * Let me know if that helps~ * Thread Starter [eysiox](https://wordpress.org/support/users/eysiox/) * (@eysiox) * [6 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-when-using-plugin-duplicator-2/#post-12743251) * I host the machine myself on my server which runs under freenas [@corylamleorg](https://wordpress.org/support/users/corylamleorg/) * [Cory Lamle](https://wordpress.org/support/users/corylamleorg/) * (@corylamleorg) * [6 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-when-using-plugin-duplicator-2/#post-12745196) * Hey [@eysiox](https://wordpress.org/support/users/eysiox/), * You might check your php.ini disabled_functions parameter to see if it’s disabled. There are quite a few links on google. Here is one that might help: [https://www.namecheap.com/support/knowledgebase/article.aspx/9396/2219/how-to-enable-exec](https://www.namecheap.com/support/knowledgebase/article.aspx/9396/2219/how-to-enable-exec) * Hope the that helps~ * Thread Starter [eysiox](https://wordpress.org/support/users/eysiox/) * (@eysiox) * [6 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-when-using-plugin-duplicator-2/#post-12745569) * I looked at the site you shared with me, but there wasn’t even any information on linen or disabling “show_source, system, shell_exec.” I don’t know what to do anymore. * [Cory Lamle](https://wordpress.org/support/users/corylamleorg/) * (@corylamleorg) * [6 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-when-using-plugin-duplicator-2/#post-12745851) * Hey [@eysiox](https://wordpress.org/support/users/eysiox/). * Here are a few links that might help: [link 1](https://stackoverflow.com/questions/11735538/call-to-undefined-function-filter-var) [link 2](https://www.itoctopus.com/how-to-fix-call-to-undefined-function-filter_var-error-on-joomla) [link 3](https://www.google.com/search?q=filter_var+call+to+undefined+function&rlz=1C1CHFX_enUS506US506&oq=filter_var+call+to+undefined+function&aqs=chrome..69i57j0l7.10878j0j7&sourceid=chrome&ie=UTF-8) * Thread Starter [eysiox](https://wordpress.org/support/users/eysiox/) * (@eysiox) * [6 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-when-using-plugin-duplicator-2/#post-12746142) * I just checked I’m under version “7.2.30” of php my error may come from here * [Cory Lamle](https://wordpress.org/support/users/corylamleorg/) * (@corylamleorg) * [6 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-when-using-plugin-duplicator-2/#post-12752272) * Yeah, you might also look at the forums where you downloaded the version your using and see why they may have bundled PHP without that function enabled. That is a very rare thing, its not very often that we see that issue. In all cases it’s really out of the Plugins ability to do anything because its a core method that PHP uses. * Cheers~ * Thread Starter [eysiox](https://wordpress.org/support/users/eysiox/) * (@eysiox) * [6 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-when-using-plugin-duplicator-2/#post-12754333) * I think I will re-install WordPress however would you have an updated tutorial that works under FreeNas 11.3U2 * [Cory Lamle](https://wordpress.org/support/users/corylamleorg/) * (@corylamleorg) * [6 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-when-using-plugin-duplicator-2/#post-12755062) * Hey [@eysiox](https://wordpress.org/support/users/eysiox/), * We don’t have a tutorial exactly for that version, but in general, most of the videos/tutorials we have are really independent of server setups. * Thxs~ * Thread Starter [eysiox](https://wordpress.org/support/users/eysiox/) * (@eysiox) * [6 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-when-using-plugin-duplicator-2/#post-12759873) * I’ve managed to reinstall everything I needed, the good thing is that I no longer get a long error message but I still can’t create a package. Error image: [https://zupimages.net/viewer.php?id=20/18/16z6.png](https://zupimages.net/viewer.php?id=20/18/16z6.png) * [Cory Lamle](https://wordpress.org/support/users/corylamleorg/) * (@corylamleorg) * [6 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-when-using-plugin-duplicator-2/#post-12765668) * Hey [@eysiox](https://wordpress.org/support/users/eysiox/) * If you want to submit a [support ticket](https://snapcreek.com/ticket) for this issue we can have a closer look at your setup. Please provide a link to this thread when submitting the ticket. * Thanks~ Viewing 11 replies - 1 through 11 (of 11 total) The topic ‘Fatal error when using plugin duplicator’ is closed to new replies. * ![](https://ps.w.org/duplicator/assets/icon-256x256.png?rev=2906985) * [Duplicator - Backups & Migration Plugin - Cloud Backups, Scheduled Backups, & More](https://wordpress.org/plugins/duplicator/) * [Frequently Asked Questions](https://wordpress.org/plugins/duplicator/#faq) * [Support Threads](https://wordpress.org/support/plugin/duplicator/) * [Active Topics](https://wordpress.org/support/plugin/duplicator/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/duplicator/unresolved/) * [Reviews](https://wordpress.org/support/plugin/duplicator/reviews/) * 11 replies * 2 participants * Last reply from: [Cory Lamle](https://wordpress.org/support/users/corylamleorg/) * Last activity: [6 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-when-using-plugin-duplicator-2/#post-12765668) * Status: resolved