Title: PHP Fatal error: Uncaught Error: Call to undefined function IndexWpUsersForSpeed
Last modified: November 6, 2024

---

# PHP Fatal error: Uncaught Error: Call to undefined function IndexWpUsersForSpeed

 *  Resolved [slightlydifferent](https://wordpress.org/support/users/slightlydifferent/)
 * (@slightlydifferent)
 * [1 year, 7 months ago](https://wordpress.org/support/topic/php-fatal-error-uncaught-error-call-to-undefined-function-indexwpusersforspeed/)
 * I have just installed the latest update and am getting::
 * AH01071: Got error ‘PHP message: PHP Fatal error: Uncaught Error: Call to undefined
   function IndexWpUsersForSpeed\update_action() in wp-content/plugins/index-wp-
   users-for-speed/includes/instacron.php:29\nStack trace:\n#0 wp-content/plugins/
   index-wp-users-for-speed/includes/instacron.php(35): IndexWpUsersForSpeed\need_cron()\
   n#1 wp-content/plugins/index-wp-users-for-speed/includes/plugin.php(74): require_once(‘/
   home/w…’)\n#2 wp-content/plugins/index-wp-users-for-speed/index-wp-users-for-
   speed.php(94): IndexWpUsersForSpeed\Index_Wp_Users_For_Speed->__construct()\n#
   3 wp-settings.php(467): include_once(‘/home/w…’)\n#4 wp-config.php(182): require_once(‘/
   home/w…’)\n#5 wp-load.php(50): require_once(‘/home/w…’)\n#6 wp-blog-header.php(
   13): require_once(‘/hom…’

Viewing 4 replies - 1 through 4 (of 4 total)

 *  [dbbuda](https://wordpress.org/support/users/dbbuda/)
 * (@dbbuda)
 * [1 year, 7 months ago](https://wordpress.org/support/topic/php-fatal-error-uncaught-error-call-to-undefined-function-indexwpusersforspeed/#post-18119621)
 * Same here, fatal error, plugin version 1.1.8
 *  Plugin Author [OllieJones](https://wordpress.org/support/users/olliejones/)
 * (@olliejones)
 * [1 year, 7 months ago](https://wordpress.org/support/topic/php-fatal-error-uncaught-error-call-to-undefined-function-indexwpusersforspeed/#post-18119914)
 * Dang! Sorry, folks. I’m on it.
 * This is embarrassing. Stupid typo. Forgot to test in the cron-disabled scenario.
   Blush.
 *  Plugin Author [OllieJones](https://wordpress.org/support/users/olliejones/)
 * (@olliejones)
 * [1 year, 7 months ago](https://wordpress.org/support/topic/php-fatal-error-uncaught-error-call-to-undefined-function-indexwpusersforspeed/#post-18119987)
 * Version 1.1.9 contains the fix. Sorry for the trouble.
 *  Thread Starter [slightlydifferent](https://wordpress.org/support/users/slightlydifferent/)
 * (@slightlydifferent)
 * [1 year, 7 months ago](https://wordpress.org/support/topic/php-fatal-error-uncaught-error-call-to-undefined-function-indexwpusersforspeed/#post-18121031)
 * Thanks for sorting so quick

Viewing 4 replies - 1 through 4 (of 4 total)

The topic ‘PHP Fatal error: Uncaught Error: Call to undefined function IndexWpUsersForSpeed’
is closed to new replies.

 * ![](https://ps.w.org/index-wp-users-for-speed/assets/icon-128x128.png?rev=2706957)
 * [Index WP Users For Speed](https://wordpress.org/plugins/index-wp-users-for-speed/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/index-wp-users-for-speed/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/index-wp-users-for-speed/)
 * [Active Topics](https://wordpress.org/support/plugin/index-wp-users-for-speed/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/index-wp-users-for-speed/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/index-wp-users-for-speed/reviews/)

## Tags

 * [PHP Fatal error](https://wordpress.org/support/topic-tag/php-fatal-error/)
 * [undefined function](https://wordpress.org/support/topic-tag/undefined-function/)

 * 5 replies
 * 3 participants
 * Last reply from: [slightlydifferent](https://wordpress.org/support/users/slightlydifferent/)
 * Last activity: [1 year, 7 months ago](https://wordpress.org/support/topic/php-fatal-error-uncaught-error-call-to-undefined-function-indexwpusersforspeed/#post-18121031)
 * Status: resolved