Wordpress LScache Plugin: Latest Update of LiteSpeed Causes Error
Last Updated on: Wed, 15 Apr 2026 00:00:02 Hello, Latest update of the plugin from version 3.4 to version 3.4.1 is generating errors on our log files. We are using LiteSpeed Web Server Enterprise version 5.4.9 Report number: JEBXGWFL Error sample on log files: [05-Sep-2020 03:32:06 UTC] PHP Fatal error: Uncaught Exception: Failed to fetch QUIC.cloud whitelist in wp-content/plugins/litespeed-cache/src/cloud.cls.php:981 Stack trace: #0 wp-includes/class-wp-hook.php(287): LiteSpeed Cloud::is_from_cloud(false) #1 wp-includes/plugin.php(206): WP_Hook->apply_filters(false, Array) #2 /wp-content/themes/mytheme/functions.php(256): apply_filters(litespeed_is_fr?, false) #3 /wp-includes/class-wp-hook.php(287): closure (NULL) #4 /wp-includes/plugin.php(206): WP_Hook->apply_filters(NULL, Array) #5 /wp-includes/rest-api/class-wp-rest-server.php(143): apply_filters(rest_authentica?, NULL) #6 /wp-includes/rest-api/class-wp-rest-server.php(373): WP_REST_Server->check_authentication() #7 /rest-api.php(339): WP_REST_Server->serve_request in /wp-content/plugins/litespeed-cache/src/cloud.cls.php on line 981 It seems that there is an issue with REST API. We had this issue fixed before but after the update it seems that the problem is back again. You helped us solved this issue on the following support requests: https://wordpress.org/support/topic/image-optimization-not-working-3/ We have changed nothing on our end since then, just the update of the plugin. Hi, The error message looks like failed to fetch/connect to QC server , which we indeed have had some issue on QC server, but it is fixed now , could you please try again ? Best regards, @CacheCrawler Hi, Its working again. Many thanks, Cheers! Glad to hear
LiteCache Rush: Speed comes from using less, not from doing it faster
Reference