nginx error 99

[pixel8383]

After I updated my FreeNAS installation to 11.2-U1 the web interface could not start anymore.
The error, when I try to manually start nginx via CLI is:

Code:

Starting nginx: [emerg]: bind() to IP failed (99: Cannot assign requested address)

My way out to solve this is issue was to comment the IPv6 address listen configuration for port 443 and 80 into /usr/local/etc/nginx/nginx.conf.
Do you think something is wrong somehow in my installation? How can I eventually fix it?
I am not sure the last installation should request this kind of things to work.
Thanks,
Emanuele