[Owncloud] Share link doesn't works

[Alessio Fattorini]

Hi Guys,
this is my first mail :-)

I share a file with a link like this:
http://nsrv.net***.it/owncloud/public.php?service=files&t=e2a519c3c565d7b7ee10a7d1adc821ef 


When i try to download the file this error appears:

 > Fatal error: Call to a member function getId() on a non-object in
 > /var/www/html/owncloud/lib/files/mount.php on line 95

This is a fresh install of CentOS 6
and owncloud 5 rpm based

Is it a known issue? How can i debug this?
Thank you very much



-- 
Alessio Fattorini - Nethesis srl