Error when fetching as google

I’m going crazy with this problem: when I try to fetch my web site with “fetch as google” I get a strange result:
if I try to fetch the page as “Desktop” the result is “not found”
if I try as “mobile (smartphone)” the result is “fine”

Looking at the error log of the web server I found this error every time I try to fetch the page as “Desktop”:

[Sat Jul 19 16:52:35 2014] [alert] [client 31.13.99.114] /home/itlyshop/public_html/marios/wp-content/cache/.htaccess: <IfModule takes one argument, Container for directives based on existance of specified modules

I found the same error also using facebook debug but when I browse the file with a computer I get no errors.

My website is http://www.mariosdesign.com.

This is the code of my /wp-content/cache/.htaccess:

# BEGIN supercache
<IfModule mod_mime.c>
<FilesMatch "\.html\.gz$"> ForceType text/html FileETag None </FilesMatch>
AddEncoding gzip .gz AddType text/html .gz </IfModule>
<IfModule mod_deflate.c> SetEnvIfNoCase Request_URI \.gz$ no-gzip </IfModule>
<IfModule mod_headers.c> Header set Cache-Control 'max-age=3, must-revalidate' </IfModule>
<IfModule mod_expires.c> ExpiresActive On ExpiresByType text/html A3 </IfModule>
''
# END supercache

What can I do to solve this problem?

https://wordpress.org/plugins/wp-super-cache/