I found out that the problem is more more serious! I tried to add a new site, blog.riosif.gr.
Vhosts at nginx/sites-enabled and nginx/sites-active created. But nothing created at /var/www/
At the sites options i read "/var/www/clients/client1/web34/web:/var/www/clients/client1/web34/tmp" but no web34 folder is created.
I think this is caused of the update. What should i do? Please help!