Warning: .htaccess file access hardeningDisabled

Hi guys,
I get the following warning, when I open my security informations:

.htaccess file access hardeningDisabled

In the .htaccess file access to certain files can be blocked to increase security on your site. For more information look in your .htaccess file.
 
This is the relevant section in my .htaccess file:
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# Optional hardering rules to block access to files in the following directories
# The following coditions can be enabled, when enabling at least one the last three lines NEED to be >

RewriteCond %{REQUEST_URI} ^/actions/ [OR]
RewriteCond %{REQUEST_URI} ^/bower_components/ [OR]
RewriteCond %{REQUEST_URI} ^/elgg_config/ [OR]
RewriteCond %{REQUEST_URI} ^/engine/ [OR]
RewriteCond %{REQUEST_URI} ^/grunt/ [OR]
RewriteCond %{REQUEST_URI} ^/install/ [OR]
RewriteCond %{REQUEST_URI} ^/languages/ [OR]
RewriteCond %{REQUEST_URI} ^/vendor/ [OR]
RewriteCond %{REQUEST_URI} ^/mod/(.*)/actions/ [OR]
RewriteCond %{REQUEST_URI} ^/mod/(.*)/languages/ [OR]
RewriteCond %{REQUEST_URI} ^/mod/(.*)/vendor/ [OR]
RewriteCond %{REQUEST_URI} ^/mod/(.*)/classes/ [OR]
# The following condition is needed in order to easily enable (some of the) previous conditions
RewriteCond 1 2
RewriteCond %{REQUEST_FILENAME} -f
RewriteRule ^(.*)$ - [F,L]
 
# Everything else that isn't a file gets routed through Elgg
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php [QSA,L]
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Thank you very much for your help.
 
Cheers 
 
Christoph