Title: PHP fatal error
Last modified: September 21, 2026

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# PHP fatal error

 *  Resolved [webrightnow](https://wordpress.org/support/users/webrightnow/)
 * (@webrightnow)
 * [1 week, 6 days ago](https://wordpress.org/support/topic/php-fatal-error-509/)
 * My site went down with a fatal error, when I checked the error log this was the
   issue:
 * PHP Fatal error: Uncaught Error: Class “GF_Background_Process” not found in /
   home/thedance/public_html/wp-content/plugins/gravity-forms-pdf-extended/src/Helper/
   Helper_Pdf_Queue.php:26
 * I see the plugin hasn’t had any updates in a year, is it now obsolete? I have
   disabled for now.
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fphp-fatal-error-509%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 1 replies (of 1 total)

 *  Plugin Author [Jake Jackson](https://wordpress.org/support/users/blue-liquid-designs/)
 * (@blue-liquid-designs)
 * [1 week, 5 days ago](https://wordpress.org/support/topic/php-fatal-error-509/#post-19025764)
 * Swapping over [to the canonical release of Gravity PDF](https://gravitypdf.com/news/installing-and-upgrading-to-the-canonical-version-of-gravity-pdf/)
   should resolve this problem. We no longer release new updates on WordPress.org
   and encourage all users to make the switch. Because of the WP.org rules this 
   has to be a manual swap, so we have included an admin notice about the change,
   as well as an inline notice on the Plugins list page.
    -  This reply was modified 1 week, 5 days ago by [Jake Jackson](https://wordpress.org/support/users/blue-liquid-designs/).
      Reason: "swap" to "switch"

Viewing 1 replies (of 1 total)

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 * 1 reply
 * 2 participants
 * Last reply from: [Jake Jackson](https://wordpress.org/support/users/blue-liquid-designs/)
 * Last activity: [1 week, 5 days ago](https://wordpress.org/support/topic/php-fatal-error-509/#post-19025764)
 * Status: resolved