ConfigServer Security & Firewall not load in Virtualmin

Hello,

When i tried to access to the page of ConfigServer Security & Firewall in Virtualmin, the theme reload the page and send me again to the main page of Virtualmin. I cannot access to config page of the firewall.

My system:

CentOS Linux 7.2.1511 Webmin version 1.810 Virtualmin version 5.04 Theme version Authentic Theme 18.10

I think it is a problem with authentic theme. I can access to the firewall in my iPhone with the default mobile theme.

Thanks for your help!

Ivan