I am running a WordPress website on an Xserver server and am trying to use the LiteSpeed Cache plugin. However, the plugin displays the message "LSCache cache functions are currently unavailable!" and I cannot enable caching. I contacted Xserver support, and they informed me that they do not restrict the use of the LiteSpeed Cache plugin, but they do not provide support for individual plugin issues. They suggested I contact the plugin developer or consult the WordPress official forums or search engines. They also said they *could* check the server-side settings if I provided specific details on what to check. Could you please advise on what specific server-side settings (e.g., configuration file names, setting item names, expected values) I should ask Xserver support to check to ensure that LiteSpeed Web Server is functioning correctly and that caching is enabled? I have already tried the following: * Confirmed LiteSpeed Web Server is enabled in the Xserver server panel. * Confirmed the LSCache plugin is enabled and "Enable LiteSpeed Cache" is turned on. * Disabled other cache plugins. * Checked and modified the .htaccess file permissions (to 604). * Checked the .htaccess file (ShortPixel WebP/AVIF is prioritized, LSCache WebP settings are removed). * Restart plugin and server Here is my LiteSpeed Report: * Report Number: TIERJLIU * Report Date: 2025/02/11 01:46:23 My .htaccess file contents are as follows:
# BEGIN LSCACHE
## LITESPEED WP CACHE PLUGIN - Do not edit the contents of this block! ##
<IfModule LiteSpeed>
RewriteEngine on
CacheLookup on
RewriteRule .* - [E=Cache-Control:no-autoflush]
RewriteRule litespeed/debug/.*\.log$ - [F,L]
RewriteRule \.litespeed_conf\.dat - [F,L]
### marker ASYNC start ###
RewriteCond %{REQUEST_URI} /wp-admin/admin-ajax\.php
RewriteCond %{QUERY_STRING} action=async_litespeed
RewriteRule .* - [E=noabort:1]
### marker ASYNC end ###
### marker CACHE RESOURCE start ###
RewriteRule wp-content/.*/[^/]*(responsive|css|js|dynamic|loader|fonts)\.php - [E=cache-control:max-age=3600]
### marker CACHE RESOURCE end ###
### marker DROPQS start ###
CacheKeyModify -qs:fbclid
CacheKeyModify -qs:gclid
CacheKeyModify -qs:utm*
CacheKeyModify -qs:_ga
### marker DROPQS end ###
</IfModule>
## LITESPEED WP CACHE PLUGIN - Do not edit the contents of this block! ##
# END LSCACHE
# BEGIN NON_LSCACHE
## LITESPEED WP CACHE PLUGIN - Do not edit the contents of this block! ##
### marker BROWSER CACHE start ###
<IfModule mod_expires.c>
ExpiresActive on
ExpiresByType application/pdf A31557600
ExpiresByType image/x-icon A31557600
ExpiresByType image/vnd.microsoft.icon A31557600
ExpiresByType image/svg+xml A31557600
ExpiresByType image/jpg A31557600
ExpiresByType image/jpeg A31557600
ExpiresByType image/png A31557600
ExpiresByType image/gif A31557600
ExpiresByType image/webp A31557600
ExpiresByType video/ogg A31557600
ExpiresByType audio/ogg A31557600
ExpiresByType video/mp4 A31557600
ExpiresByType video/webm A31557600
ExpiresByType text/css A31557600
ExpiresByType text/javascript A31557600
ExpiresByType application/javascript A31557600
ExpiresByType application/x-javascript A31557600
ExpiresByType application/x-font-ttf A31557600
ExpiresByType application/x-font-woff A31557600
ExpiresByType application/font-woff A31557600
ExpiresByType application/font-woff2 A31557600
ExpiresByType application/vnd.ms-fontobject A31557600
ExpiresByType font/ttf A31557600
ExpiresByType font/otf A31557600
ExpiresByType font/woff A31557600
ExpiresByType font/woff2 A31557600
</IfModule>
### marker BROWSER CACHE end ###
## LITESPEED WP CACHE PLUGIN - Do not edit the contents of this block! ##
# END NON_LSCACHE
SetEnvIf Request_URI ".*" Ngx_Cache_NoCacheMode=off
SetEnvIf Request_URI ".*" Ngx_Cache_AllCacheMode
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{HTTPS} !=on [NC]
RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [R=301,L]
</IfModule>
# BEGIN WordPress
# "BEGIN WordPress" から "END WordPress" までのディレクティブ (行) は
# 動的に生成され、WordPress フィルターによってのみ修正が可能です。
# これらのマーカー間にあるディレクティブへのいかなる変更も上書きされてしまいます。
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress
# BEGIN ShortPixelWebp
# "BEGIN ShortPixelWebp" から "END ShortPixelWebp" までのディレクティブ (行) は
# 動的に生成され、WordPress フィルターによってのみ修正が可能です。
# これらのマーカー間にあるディレクティブへのいかなる変更も上書きされてしまいます。
<IfModule mod_rewrite.c>
RewriteEngine On
##### Directives for delivering AVIF files, if they exist #####
# Does the browser support avif?
RewriteCond %{HTTP_ACCEPT} image/avif
# AND is the request a jpg or png? (also grab the basepath %1 to match in the next rule)
RewriteCond %{REQUEST_URI} ^(.+)\.(?:jpe?g|png|gif)$
# AND does a .avif image exist?
RewriteCond %{DOCUMENT_ROOT}/%1.avif -f
# THEN send the avif image and set the env var avif
RewriteRule (.+)\.(?:jpe?g|png)$ $1.avif [NC,T=image/avif,E=avif,L]
# Does the browser support avif?
RewriteCond %{HTTP_ACCEPT} image/avif
# AND is the request a jpg or png? (also grab the basepath %1 to match in the next rule)
RewriteCond %{REQUEST_URI} ^(.+)\.(?:jpe?g|png|gif)$
# AND does a .jpg.avif image exist?
RewriteCond %{DOCUMENT_ROOT}%{REQUEST_URI}.avif -f
# THEN send the avif image and set the env var avif
RewriteRule ^(.+)$ $1.avif [NC,T=image/avif,E=avif,L]
</IfModule>
<IfModule mod_headers.c>
# If REDIRECT_avif env var exists, append Accept to the Vary header
Header append Vary Accept env=REDIRECT_avif
</IfModule>
<IfModule mod_mime.c>
AddType image/avif .avif
</IfModule>
<IfModule mod_rewrite.c>
RewriteEngine On
##### TRY FIRST the file appended with .webp (ex. test.jpg.webp) #####
# Is the browser Chrome?
RewriteCond %{HTTP_USER_AGENT} Chrome [OR]
# OR Is request from Page Speed
RewriteCond %{HTTP_USER_AGENT} "Google Page Speed Insights" [OR]
# OR does this browser explicitly support webp
RewriteCond %{HTTP_ACCEPT} image/webp
# AND NOT MS EDGE 42/17 - doesnt work.
RewriteCond %{HTTP_USER_AGENT} !Edge/17
# AND is the request a jpg, png or gif?
RewriteCond %{REQUEST_URI} ^(.+)\.(?:jpe?g|png|gif)$
# AND does a .ext.webp image exist?
RewriteCond %{DOCUMENT_ROOT}%{REQUEST_URI}.webp -f
# THEN send the webp image and set the env var webp
RewriteRule ^(.+)$ $1.webp [NC,T=image/webp,E=webp,L]
##### IF NOT, try the file with replaced extension (test.webp) #####
RewriteCond %{HTTP_USER_AGENT} Chrome [OR]
RewriteCond %{HTTP_USER_AGENT} "Google Page Speed Insights" [OR]
RewriteCond %{HTTP_ACCEPT} image/webp
RewriteCond %{HTTP_USER_AGENT} !Edge/17
# AND is the request a jpg, png or gif? (also grab the basepath %1 to match in the next rule)
RewriteCond %{REQUEST_URI} ^(.+)\.(?:jpe?g|png|gif)$
# AND does a .webp image exist?
RewriteCond %{DOCUMENT_ROOT}/%1.webp -f
# THEN send the webp image and set the env var webp
RewriteRule (.+)\.(?:jpe?g|png|gif)$ $1.webp [NC,T=image/webp,E=webp,L]
</IfModule>
<IfModule mod_headers.c>
# If REDIRECT_webp env var exists, append Accept to the Vary header
Header append Vary Accept env=REDIRECT_webp
</IfModule>
<IfModule mod_mime.c>
AddType image/webp .webp
</IfModule>
# END ShortPixelWebp
# BEGIN LSCACHE
## LITESPEED WP CACHE PLUGIN - Do not edit the contents of this block! ##
<IfModule LiteSpeed>
RewriteEngine on
CacheLookup on
RewriteRule .* - [E=Cache-Control:no-autoflush]
RewriteRule litespeed/debug/.*\.log$ - [F,L]
RewriteRule \.litespeed_conf\.dat - [F,L]
### marker ASYNC start ###
RewriteCond %{REQUEST_URI} /wp-admin/admin-ajax\.php
RewriteCond %{QUERY_STRING} action=async_litespeed
RewriteRule .* - [E=noabort:1]
### marker ASYNC end ###
### marker CACHE RESOURCE start ###
RewriteRule wp-content/.*/[^/]*(responsive|css|js|dynamic|loader|fonts)\.php - [E=cache-control:max-age=3600]
### marker CACHE RESOURCE end ###
### marker DROPQS start ###
CacheKeyModify -qs:fbclid
CacheKeyModify -qs:gclid
CacheKeyModify -qs:utm*
CacheKeyModify -qs:_ga
### marker DROPQS end ###
</IfModule>
## LITESPEED WP CACHE PLUGIN - Do not edit the contents of this block! ##
# END LSCACHE
# BEGIN NON_LSCACHE
## LITESPEED WP CACHE PLUGIN - Do not edit the contents of this block! ##
### marker BROWSER CACHE start ###
<IfModule mod_expires.c>
ExpiresActive on
ExpiresByType application/pdf A31557600
ExpiresByType image/x-icon A31557600
ExpiresByType image/vnd.microsoft.icon A31557600
ExpiresByType image/svg+xml A31557600
ExpiresByType image/jpg A31557600
ExpiresByType image/jpeg A31557600
ExpiresByType image/png A31557600
ExpiresByType image/gif A31557600
ExpiresByType image/webp A31557600
ExpiresByType video/ogg A31557600
ExpiresByType audio/ogg A31557600
ExpiresByType video/mp4 A31557600
ExpiresByType video/webm A31557600
ExpiresByType text/css A31557600
ExpiresByType text/javascript A31557600
ExpiresByType application/javascript A31557600
ExpiresByType application/x-javascript A31557600
ExpiresByType application/x-font-ttf A31557600
ExpiresByType application/x-font-woff A31557600
ExpiresByType application/font-woff A31557600
ExpiresByType application/font-woff2 A31557600
ExpiresByType application/vnd.ms-fontobject A31557600
ExpiresByType font/ttf A31557600
ExpiresByType font/otf A31557600
ExpiresByType font/woff A31557600
ExpiresByType font/woff2 A31557600
</IfModule>
### marker BROWSER CACHE end ###
## LITESPEED WP CACHE PLUGIN - Do not edit the contents of this block! ##
# END NON_LSCACHE
SetEnvIf Request_URI ".*" Ngx_Cache_NoCacheMode=off
SetEnvIf Request_URI ".*" Ngx_Cache_AllCacheMode
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{HTTPS} !=on [NC]
RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [R=301,L]
</IfModule>
# BEGIN WordPress
# "BEGIN WordPress" から "END WordPress" までのディレクティブ (行) は
# 動的に生成され、WordPress フィルターによってのみ修正が可能です。
# これらのマーカー間にあるディレクティブへのいかなる変更も上書きされてしまいます。
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress
# BEGIN ShortPixelWebp
# "BEGIN ShortPixelWebp" から "END ShortPixelWebp" までのディレクティブ (行) は
# 動的に生成され、WordPress フィルターによってのみ修正が可能です。
# これらのマーカー間にあるディレクティブへのいかなる変更も上書きされてしまいます。
<IfModule mod_rewrite.c>
RewriteEngine On
##### Directives for delivering AVIF files, if they exist #####
# Does the browser support avif?
RewriteCond %{HTTP_ACCEPT} image/avif
# AND is the request a jpg or png? (also grab the basepath %1 to match in the next rule)
RewriteCond %{REQUEST_URI} ^(.+)\.(?:jpe?g|png|gif)$
# AND does a .avif image exist?
RewriteCond %{DOCUMENT_ROOT}/%1.avif -f
# THEN send the avif image and set the env var avif
RewriteRule (.+)\.(?:jpe?g|png)$ $1.avif [NC,T=image/avif,E=avif,L]
# Does the browser support avif?
RewriteCond %{HTTP_ACCEPT} image/avif
# AND is the request a jpg or png? (also grab the basepath %1 to match in the next rule)
RewriteCond %{REQUEST_URI} ^(.+)\.(?:jpe?g|png|gif)$
# AND does a .jpg.avif image exist?
RewriteCond %{DOCUMENT_ROOT}%{REQUEST_URI}.avif -f
# THEN send the avif image and set the env var avif
RewriteRule ^(.+)$ $1.avif [NC,T=image/avif,E=avif,L]
</IfModule>
<IfModule mod_headers.c>
# If REDIRECT_avif env var exists, append Accept to the Vary header
Header append Vary Accept env=REDIRECT_avif
</IfModule>
<IfModule mod_mime.c>
AddType image/avif .avif
</IfModule>
<IfModule mod_rewrite.c>
RewriteEngine On
##### TRY FIRST the file appended with .webp (ex. test.jpg.webp) #####
# Is the browser Chrome?
RewriteCond %{HTTP_USER_AGENT} Chrome [OR]
# OR Is request from Page Speed
RewriteCond %{HTTP_USER_AGENT} "Google Page Speed Insights" [OR]
# OR does this browser explicitly support webp
RewriteCond %{HTTP_ACCEPT} image/webp
# AND NOT MS EDGE 42/17 - doesnt work.
RewriteCond %{HTTP_USER_AGENT} !Edge/17
# AND is the request a jpg, png or gif?
RewriteCond %{REQUEST_URI} ^(.+)\.(?:jpe?g|png|gif)$
# AND does a .ext.webp image exist?
RewriteCond %{DOCUMENT_ROOT}%{REQUEST_URI}.webp -f
# THEN send the webp image and set the env var webp
RewriteRule ^(.+)$ $1.webp [NC,T=image/webp,E=webp,L]
##### IF NOT, try the file with replaced extension (test.webp) #####
RewriteCond %{HTTP_USER_AGENT} Chrome [OR]
RewriteCond %{HTTP_USER_AGENT} "Google Page Speed Insights" [OR]
RewriteCond %{HTTP_ACCEPT} image/webp
RewriteCond %{HTTP_USER_AGENT} !Edge/17
# AND is the request a jpg, png or gif? (also grab the basepath %1 to match in the next rule)
RewriteCond %{REQUEST_URI} ^(.+)\.(?:jpe?g|png|gif)$
# AND does a .webp image exist?
RewriteCond %{DOCUMENT_ROOT}/%1.webp -f
# THEN send the webp image and set the env var webp
RewriteRule (.+)\.(?:jpe?g|png|gif)$ $1.webp [NC,T=image/webp,E=webp,L]
</IfModule>
<IfModule mod_headers.c>
# If REDIRECT_webp env var exists, append Accept to the Vary header
Header append Vary Accept env=REDIRECT_webp
</IfModule>
<IfModule mod_mime.c>
AddType image/webp .webp
</IfModule>
# END ShortPixelWebp
