Wordpress LScache Plugin: Fatal error after downgrade to 3.6.4
Last Updated on: Wed, 15 Apr 2026 00:00:02 Report No. BVNBKAIY Hi LS, As I downgraded from 4.2 to 3.6.4 I was met with the fatal error message below. I was able to login into WP afterwards and activate the 3.6.4 LS-plugin, and the site now works without problems. So I do not need further help or support. I just want to let you know in case it may be helpful for future bug fixes etc. Fatal error: Uncaught Error: Call to protected LiteSpeed Data::__construct() from context LiteSpeed Root in /home/iotedk/public_html/wp-content/plugins/litespeed-cache/src/root.cls.php on line 84 Call stack: LiteSpeed Root::cls() wp-content/plugins/litespeed-cache/src/purge.cls.php:270 LiteSpeed Purge::_purge_all_cssjs() wp-content/plugins/litespeed-cache/src/purge.cls.php:159 LiteSpeed Purge::_purge_all() wp-content/plugins/litespeed-cache/src/purge.cls.php:148 LiteSpeed Purge::purge_all() wp-includes/class-wp-hook.php:305 WP_Hook::apply_filters() wp-includes/class-wp-hook.php:327 WP_Hook::do_action() wp-includes/plugin.php:470 do_action() wp-admin/includes/class-wp-upgrader.php:857 WP_Upgrader::run() wp-admin/includes/class-plugin-upgrader.php:231 Plugin_Upgrader::upgrade() wp-content/plugins/litespeed-cache/src/activation.cls.php:485 LiteSpeed Activation::upgrade() wp-content/plugins/litespeed-cache/src/debug2.cls.php:90 LiteSpeed Debug2::beta_test() wp-content/plugins/litespeed-cache/src/debug2.cls.php:454 LiteSpeed Debug2::handler() wp-content/plugins/litespeed-cache/src/router.cls.php:730 LiteSpeed Router::handler() wp-content/plugins/litespeed-cache/src/core.cls.php:291 LiteSpeed Core::proceed_action() wp-content/plugins/litespeed-cache/src/core.cls.php:238 LiteSpeed Core::after_user_init() wp-includes/class-wp-hook.php:303 WP_Hook::apply_filters() wp-includes/class-wp-hook.php:327 WP_Hook::do_action() wp-includes/plugin.php:470 do_action() wp-settings.php:578 require_once() wp-config.php:103 require_once() wp-load.php:50 require_once() wp-admin/admin.php:34Expand The page I need help with: https://www.io-te.dk I also receive the following error message via email: E_ERROR happened in line 84 in the file /home/iotedk/public_html/wp-content/plugins/litespeed-cache/src/root.cls.php. Error message: Uncaught Error: Call to protected LiteSpeed Data::__construct() from context LiteSpeed Root in /home/iotedk/public_html/wp-content/plugins/litespeed-cache/src/root.cls.php:84 Stack trace: #0 /home/iotedk/public_html/wp-content/plugins/litespeed-cache/src/purge.cls.php(270): LiteSpeed Root::cls(LiteSpeed Data) #1 /home/iotedk/public_html/wp-content/plugins/litespeed-cache/src/purge.cls.php(159): LiteSpeed Purge->_purge_all_cssjs(true) #2 /home/iotedk/public_html/wp-content/plugins/litespeed-cache/src/purge.cls.php(148): LiteSpeed Purge->_purge_all(Object(Plugin_Upgrader)) #3 /home/iotedk/public_html/wp-includes/class-wp-hook.php(305): LiteSpeed Purge::purge_all(Object(Plugin_Upgrader)) #4 /home/iotedk/public_html/wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters(NULL, Array) #5 /home/iotedk/public_html/wp-includes/plugin.php(470): WP_Hook->do_action(Array) #6 /home/iotedk/public_html/wp-admin/includes/class-wp-upgrader.php(857): do_action(upgrader_proces..., Object(Plugin_Upgrader), Array) #7 / i did rollback to 3.6.4 by wp rollback plugin without problems. Thanks for the feedback. This is an known issue. We added a warning for downgrade on Beta Test page in latest version
LiteCache Rush: Speed comes from using less, not from doing it faster
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