“WordPress Fastest Cache” is a popular cache plugin in WordPress and it also works with us.
However, some settings in the plugin may cause your page to display “Internal server error“.
This is usually because you have enabled the “Gzip” part of the plugin.
This part is not required as our servers already have Gzip enabled.
However, the plugin adds to the following rows in your .htaccess file, which causes the page to stop working:
# BEGIN GzipWpFastestCache
AddType x-font/woff .woff
AddType x-font/ttf .ttf
AddOutputFilterByType DEFLATE image/svg+xml
AddOutputFilterByType DEFLATE text/plain
AddOutputFilterByType DEFLATE text/html
AddOutputFilterByType DEFLATE text/xml
AddOutputFilterByType DEFLATE text/css
AddOutputFilterByType DEFLATE text/javascript
AddOutputFilterByType DEFLATE application/xml
AddOutputFilterByType DEFLATE application/xhtml+xml
AddOutputFilterByType DEFLATE application/rss+xml
AddOutputFilterByType DEFLATE application/javascript
AddOutputFilterByType DEFLATE application/x-javascript
AddOutputFilterByType DEFLATE application/x-font-ttf
AddOutputFilterByType DEFLATE application/vnd.ms-fontobject
AddOutputFilterByType DEFLATE font/opentype font/ttf font/eot font/otf
# END GzipWpFastestCache
These need to be removed. Simply do it via FTP. Open the .htaccess file and delete these lines. Then reload the file and the page will reappear. AddOutputFilterByType is no longer supported by Apache 2.4.