Title: PhP Fatal Error: PhP Configuration Error Last modified: January 20, 2022 --- # PhP Fatal Error: PhP Configuration Error * [may](https://wordpress.org/support/users/mcp2019/) * (@mcp2019) * [4 years, 4 months ago](https://wordpress.org/support/topic/php-fatal-error-php-configuration-error/) * Hi, * I haven’t updated and worked on my website (which is not live yet) for a very long time. This week I finally picked it up again. * Needless to say I had to update lots of plugins and WordPress itself. * So I deactivated all of the plugins, updated WordPress, and then updated and activated the plugins one at a time. * In doing this, lots of errors occurred. * These are the errors: * ``` FastCGI: server "/var/run/php74-cgi/php-cgi" stderr: PHP message: The is_ajax function is deprecated since version 6.1.0. Replace with wp_doing_ajax., referer: https://websiteurl.com/wp-admin/ FastCGI: server "/var/run/php74-cgi/php-cgi" stderr: PHP message: The is_ajax function is deprecated since version 6.1.0. Replace with wp_doing_ajax., referer: https://websiteurl.com/wp-admin/admin-ajax.php?action=as_async_request_queue_runner&nonce=1ddf34b68f FastCGI: server "/var/run/php74-cgi/php-cgi" stderr: PHP message: The is_ajax function is deprecated since version 6.1.0. Replace with wp_doing_ajax., referer: https://websiteurl.com/wp-admin/admin.php?page=wc-settings&tab=mollie_settings FastCGI: server "/var/run/php74-cgi/php-cgi" stderr: PHP message: The is_ajax function is deprecated since version 6.1.0. Replace with wp_doing_ajax., referer: https://websiteurl.com/wp-admin/upload.php FastCGI: server "/var/run/php74-cgi/php-cgi" stderr: PHP message: The is_ajax function is deprecated since version 6.1.0. Replace with wp_doing_ajax., referer: https://websiteurl.com/wp-admin/admin-ajax.php?action=as_async_request_queue_runner&nonce=1ddf34b68f FastCGI: server "/var/run/php74-cgi/php-cgi" stderr: PHP message: PHP Fatal error: Unknown: PHP Configuration Error (SETNS_REVERT_FAILURE): 22 3 in Unknown on line 0 ``` * I found that the errors occurred when activating Woocommerce and Woocommerce add-on plugins. I’ve found another ticket here on WordPress.org concerning a similar error but I’m not sure what to do. * PS. Is it more practical to do a clean install of the website and start over at this point? * Does anyone have some advice for me? * Thanks! - This topic was modified 4 years, 4 months ago by [Steven Stern (sterndata)](https://wordpress.org/support/users/sterndata/). Viewing 5 replies - 1 through 5 (of 5 total) * [corrinarusso](https://wordpress.org/support/users/corrinarusso/) * (@corrinarusso) * [4 years, 4 months ago](https://wordpress.org/support/topic/php-fatal-error-php-configuration-error/#post-15273182) * > I found that the errors occurred when activating > Woocommerce and Woocommerce add-on plugins * Surprise, surprise. * > Is it more practical to do a clean install of the website and start over at this point? * Not really, unless you want to. * Is this on an Apache server, or on IIS ? There could be many different reasons for these errors, but it’s not really a WordPress issue. It’s a server issue. Contact your host first and ask them if you have to be running fast-cgi, or you can move to PHP-FPM. * Thread Starter [may](https://wordpress.org/support/users/mcp2019/) * (@mcp2019) * [4 years, 4 months ago](https://wordpress.org/support/topic/php-fatal-error-php-configuration-error/#post-15281225) * Hi [@corrinarusso](https://wordpress.org/support/users/corrinarusso/), * Thanks for your reply and your tip. * Wow, seems like there’re many problems caused by Woocommerce and the add-ons.. * The website is probably run on an Apache server. Although I don’t know this for certain. * May I ask, what is the difference between whether it runs on fast-cgi or PHP- FPM? Will PHP-FPM not cause these errors? * I’m not at all familiar with these terms, so please don’t mind my questions. * I’ll get in touch with my hosting company. If there’s any news, I will update it here. * Also if anyone else has other ideas, please advise. * [corrinarusso](https://wordpress.org/support/users/corrinarusso/) * (@corrinarusso) * [4 years, 4 months ago](https://wordpress.org/support/topic/php-fatal-error-php-configuration-error/#post-15281244) * PHP-FPM is just a different way to bundle php with Apache. Each host will have their own preference or policy what to you. The PHP-FPM should be faster simply bc of the way it threads processes. * > seems like there’re many problems caused by Woocommerce and the add-ons.. * Yes – often. * These are not fatal errors tho, right? They’re just messages. * Thread Starter [may](https://wordpress.org/support/users/mcp2019/) * (@mcp2019) * [4 years, 4 months ago](https://wordpress.org/support/topic/php-fatal-error-php-configuration-error/#post-15283277) * Hi [@corrinarusso](https://wordpress.org/support/users/corrinarusso/), * Thanks for your explanation. * Unfortunately, there is one fatal error: * FastCGI: server “/var/run/php74-cgi/php-cgi” stderr: PHP message: PHP Fatal error: Unknown: PHP Configuration Error (SETNS_REVERT_FAILURE): 22 3 in Unknown on line 0 * So, the messages are not crucial, only fatal errors have to be addressed? * [corrinarusso](https://wordpress.org/support/users/corrinarusso/) * (@corrinarusso) * [4 years, 4 months ago](https://wordpress.org/support/topic/php-fatal-error-php-configuration-error/#post-15284192) * Notices can often ‘be ignored’ and Notices and Warnings do not take your site offline. * You will need to reach out to your host – this is a server error: [https://man7.org/linux/man-pages/man2/setns.2.html](https://man7.org/linux/man-pages/man2/setns.2.html) * > PHP Fatal error: Unknown: PHP Configuration Error (SETNS_REVERT_FAILURE) Viewing 5 replies - 1 through 5 (of 5 total) The topic ‘PhP Fatal Error: PhP Configuration Error’ is closed to new replies. ## Tags * [fatal error](https://wordpress.org/support/topic-tag/fatal-error/) * [php-error](https://wordpress.org/support/topic-tag/php-error/) * [WordPress update](https://wordpress.org/support/topic-tag/wordpress-update/) * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/) * 5 replies * 2 participants * Last reply from: [corrinarusso](https://wordpress.org/support/users/corrinarusso/) * Last activity: [4 years, 4 months ago](https://wordpress.org/support/topic/php-fatal-error-php-configuration-error/#post-15284192) * Status: not resolved ## Topics ### Topics with no replies ### Non-support topics ### Resolved topics ### Unresolved topics ### All topics