Steps to reproduce the issue
Go to http://sosdislessia-ferrara.it

Expected result
Home article loaded as main menu item is "featured articles".

Actual result
Blanks between breadcrumbs position and footer. Links to single articles result in 404 page.

System information (as much as possible)
PHP Built On : Linux webxc206rg03s05.ad.aruba.it 3.10.0-229.20.1.el7.x86_64 #1 SMP Tue Nov 3 19:10:07 UTC 2015 x86_64
Database Version : 5.5.46-37.6-log
Database Collation : latin1_swedish_ci
PHP Version : 5.5.31
Web Server : Apache
WebServer to PHP Interface : cgi-fcgi
Joomla! Version : Joomla! 3.4.8 Stable [ Ember ] 24-December-2015 19:30 GMT
Joomla! Platform Version : Joomla Platform 13.1.0 Stable [ Curiosity ] 24-Apr-2013 00:00 GMT

Additional information
Joomla installation directory : /joomla
Docs root .htaccess (whole content) :
RewriteCond %{REQUEST_URI} !^/joomla
RewriteRule ^(.*)$ joomla/$1 [L]
/joomla/.htaccess (uncommented content) :
IndexIgnore *
RewriteEngine On
RewriteCond %{QUERY_STRING} base64_encode[^(]*([^)]*) [OR]
RewriteCond %{QUERY_STRING} (<|%3C)([^s]*s)+cript.*(>|%3E) [NC,OR]
RewriteCond %{QUERY_STRING} GLOBALS(=|[|%[0-9A-Z]{0,2}) [OR]
RewriteCond %{QUERY_STRING} _REQUEST(=|[|%[0-9A-Z]{0,2})
RewriteRule .* index.php [F]
RewriteBase /joomla
RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
RewriteCond %{REQUEST_URI} !^/index.php
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule .* index.php [L]

Additional comments
Tries I've already made without result:

• changing template
• disabling plugins (the ones found on the web that might be related to this)
• disabling modules
• using different browser

Thank you for any help