Title: Fata error on activation plugin
Last modified: June 1, 2026

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# Fata error on activation plugin

 *  [annelyse](https://wordpress.org/support/users/annelyse/)
 * (@annelyse)
 * [1 week ago](https://wordpress.org/support/topic/fata-error-on-activation-plugin/)
 * Hello,
 * I have a fatar error when I want to install the plugin.
 *     ```wp-block-code
       PHP Fatal error: Uncaught Error: Call to undefined function LiteSpeed\litespeed_oc_disable_ext_cache() in public_html/wp-content/plugins/litespeed-cache/src/object-cache.cls.php:586Stack trace:#0 public_html/wp-content/plugins/litespeed-cache/src/object-cache.cls.php(444): LiteSpeed\Object_Cache->_connect()#1 public_html/wp-content/plugins/litespeed-cache/src/object-cache.cls.php(389): LiteSpeed\Object_Cache->_reconnect()#2 public_html/wp-content/plugins/litespeed-cache/src/activation.cls.php(338): LiteSpeed\Object_Cache->update_file()#3 public_html/wp-content/plugins/litespeed-cache/src/activation.cls.php(82): LiteSpeed\Activation->update_files()#4 public_html/wp-includes/class-wp-hook.php(341): LiteSpeed\Activation::register_activation()#5 public_html/wp-includes/class-wp-hook.php(365): WP_Hook->apply_filters()#6 public_html/wp-includes/plugin.php(522): WP_Hook->do_action()#7 public_html/wp-admin/includes/plugin.php(703): do_action()#8 public_html/wp-admin/plugins.php(60): activate_plugin()#9 {main}thrown in public_html/wp-content/plugins/litespeed-cache/src/object-cache.cls.php on line 586
       ```
   
 * Maybe since I disabled redis or active version 7 worpress
 * Do you know why ?
 * Thanks a lot

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

 *  Plugin Support [qtwrk](https://wordpress.org/support/users/qtwrk/)
 * (@qtwrk)
 * [6 days, 17 hours ago](https://wordpress.org/support/topic/fata-error-on-activation-plugin/#post-18925721)
 * please try , use phpmyadmin , go to wp_options table , find option `litespeed.
   conf.object` , set value to `0` , then try to activate plugin , see if you still
   get this error.
 *  Thread Starter [annelyse](https://wordpress.org/support/users/annelyse/)
 * (@annelyse)
 * [6 days, 7 hours ago](https://wordpress.org/support/topic/fata-error-on-activation-plugin/#post-18926203)
 * Hello,
 * It’s works thanks you, I’m able to activate the plugin again. 
   but anytime I’m
   trying to configurate REDIS inside the plugin it’s say :
 * Extension Memcached : Activé(e)
   Extension Redis : Activé(e)Test de connexion:
   Échouée
 * I have the plugin Redis Object Cache and it’s say : well connected
 * Thank you for your help
 *  Plugin Support [qtwrk](https://wordpress.org/support/users/qtwrk/)
 * (@qtwrk)
 * [6 days, 6 hours ago](https://wordpress.org/support/topic/fata-error-on-activation-plugin/#post-18926288)
 * Test de connexion: Échouée
 * translate shows “standard” , I am not sure what does that mean , I assume it 
   means error ?
 * make sure you set correct host/port/DB/user/pass for Redis
 *  Thread Starter [annelyse](https://wordpress.org/support/users/annelyse/)
 * (@annelyse)
 * [6 days, 5 hours ago](https://wordpress.org/support/topic/fata-error-on-activation-plugin/#post-18926317)
 * oups sorry : Connection test : Echec
   I have set correctly the information, like
   before, but i changed the password.
 * I will try to ask to the support of my hosting
 * Thanks you

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

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 * 4 replies
 * 2 participants
 * Last reply from: [annelyse](https://wordpress.org/support/users/annelyse/)
 * Last activity: [6 days, 5 hours ago](https://wordpress.org/support/topic/fata-error-on-activation-plugin/#post-18926317)
 * Status: not resolved