how to fix specify cache validator in gtmetrix report

Hello,

I get this error-“Specify a cache validator” in GTMetrix report for all the images that i have on my page-www.sgbiosciences.com. GTMetrix Link: https://gtmetrix.com/reports/www.sgbiosciences.com/Ngh7PkT2
Below is my htaccess code to check if something is wrong:

# BEGIN WordPress
# The directives (lines) between BEGIN WordPress and END WordPress are
# dynamically generated, and should only be modified via WordPress filters.
# Any changes to the directives between these markers will be overwritten.
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ – [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

# END WordPress
# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ – [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress
# BEGIN ShortPixelWebp
# The directives (lines) between BEGIN ShortPixelWebp and END ShortPixelWebp are
# dynamically generated, and should only be modified via WordPress filters.
# Any changes to the directives between these markers will be overwritten.
# END ShortPixelWebp
# BEGIN WP-Optimize Browser Cache
<IfModule mod_expires.c>
ExpiresActive On
ExpiresByType text/css “access 1 year 1 day”
ExpiresByType text/html “access 1 year 1 day”
ExpiresByType image/gif “access 1 year 1 day”
ExpiresByType image/png “access 1 year 1 day”
ExpiresByType image/jpg “access 1 year 1 day”
ExpiresByType image/jpeg “access 1 year 1 day”
ExpiresByType image/webp “access 1 year 1 day”
ExpiresByType image/x-icon “access 1 year 1 day”
ExpiresByType application/pdf “access 1 year 1 day”
ExpiresByType application/javascript “access 1 year 1 day”
ExpiresByType text/x-javascript “access 1 year 1 day”
ExpiresByType application/x-shockwave-flash “access 1 year 1 day”
ExpiresDefault “access 1 year 1 day”
</IfModule>

<IfModule mod_headers.c>
<filesMatch “\.(ico|jpe?g|png|gif|webp|swf)$”>
Header set Cache-Control “public”
</filesMatch>
<filesMatch “\.(css)$”>
Header set Cache-Control “public”
</filesMatch>
<filesMatch “\.(js)$”>
Header set Cache-Control “private”
</filesMatch>
<filesMatch “\.(x?html?|php)$”>
Header set Cache-Control “private, must-revalidate”
</filesMatch>
</IfModule>

#Disable ETag
FileETag None
# END WP-Optimize Browser Cache

• This topic was modified 5 years ago by kanikam15.

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