Wordpress LScache Plugin: PHP Error undefined function is_plugin_active_for_network()
Last Updated on: Wed, 15 Apr 2026 00:00:02 When Litespeed plugin is active, it causes a PHP error when attempting to update any site plugin remotely. Appears to be an undefined function in plugin file. Occuring across several different domains. Deactiviating Litespeed plugin solves issue. Remote management is IWP (https://infinitewp.com/ ) Occuring in Litespeed Plugin Versions 1.8.3 and 1.9 Error and stack trace below: PHP Fatal error occurred: Uncaught Error: Call to undefined function is_plugin_active_for_network() in /home/$account/$domain.com/wp-content/plugins/litespeed-cache/admin/litespeed-cache-admin-display.class.php:75 Stack trace: #0 /home/$account/$domain.com/wp-content/plugins/litespeed-cache/admin/litespeed-cache-admin-display.class.php(944): LiteSpeed_Cache_Admin_Display->__construct() #1 /home/$account/$domain.com/wp-content/plugins/litespeed-cache/admin/litespeed-cache-admin.class.php(33): LiteSpeed_Cache_Admin_Display::get_instance() #2 /home/$account/$domain.com/wp-content/plugins/litespeed-cache/admin/litespeed-cache-admin.class.php(278): LiteSpeed_Cache_Admin->__construct() #3 /home/$account/$domain.com/wp-content/plugins/litespeed-cache/inc/litespeed-cache.class.php(158): LiteSpeed_Cache_Admin::get_instance() #4 /home/$account/$domain.com/wp-includes/class-wp-hook.php(286): LiteSpeed_Cache->init( ) #5 /home/$account/$domain.com/wp in /home/$account/$domain.com/wp-content/plugins/litespeed-cache/admin/litespeed-cache-admin-display.class.php on line 75. Noted. Will check the compatibility. Thanks for report. This will be fixed in the following release.
LiteCache Rush: Speed comes from using less, not from doing it faster
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