Wordpress LScache Plugin: Website Critical Error
Last Updated on: Wed, 15 Apr 2026 00:00:02 Hi, I cant log into my wordpress admin today, and the auto-email from WordPress seems to point to Litespeed Cache causing the critical error ? details below. The safemode login returns the same error and so Im unable to disable the plugin. I havent just installed the theme or LSC, and theyve been working together fine for a couple of weeks now. Whats the best way of uninstalling LSC so I can get into the admin? Thanks WordPress version 6.0.1 Active theme: Astra (version 3.9.1) Current plugin: LiteSpeed Cache (version 5.0.0.1) PHP version 8.0.21 Error Details ============= An error of type E_ERROR was caused in line 583 of the file /home/u158024987/domains/great-british-watch.co.uk/public_html/wp-content/plugins/litespeed-cache/src/root.cls.php. Error message: Uncaught TypeError: array_merge(): Argument #1 must be of type array, null given in /home/u158024987/domains/great-british-watch.co.uk/public_html/wp-content/plugins/litespeed-cache/src/root.cls.php:583 Stack trace: #0 /home/u158024987/domains/great-british-watch.co.uk/public_html/wp-content/plugins/litespeed-cache/src/root.cls.php(583): array_merge() #1 /home/u158024987/domains/great-british-watch.co.uk/public_html/wp-content/plugins/litespeed-cache/tpl/banner/new_version.php(24): LiteSpeed Root::save_summary() #2 /home/u158024987/domains/great-british-watch.co.uk/public_html/wp-content/plugins/litespeed-cache/src/gui.cls.php(354): include(/home/u15802498...) #3 /home/u158024987/domains/great-british-watch.co.uk/public_html/wp-content/plugins/litespeed-cache/src/admin-display.cls.php(185): LiteSpeed GUI->show_promo() #4 /home/u158024987/domains/great-british-watch.co.uk/public_html/wp-includes/class-wp-hook.php(307): LiteSpeed Admin_Display->enqueue_scripts() #5 /home/u158024987/domains/great-british-watch.co.uk/public_html/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters() #6 /home/u158024987/domains/great-british-watch.co.uk/public_html/wp-includes/plugin.php(476): WP_Hook->do_action() #7 /home/u158024987/domains/great-british-watch.co.uk/public_html/wp-admin/admin-header.php(118): do_action() #8 /home/u158024987/domains/great-british-watch.co.uk/public_html/wp-admin/index.php(137): require_once(/home/u15802498...) #9 main thrown please upgrade to v5.1, it contains the fix to this error. Hi, thanks, but I cant access the admin and so I cant update it. you can use file manager or FTP to directly upload files to override existing file ok, thanks
LiteCache Rush: Speed comes from using less, not from doing it faster
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