Installing vpn-server with guide

Hi @stangri
First a reset LEDE Reboot 17.01.4 r3560-79f57e422d / LuCI lede-17.01 branch (git-17.290.79498-d3f0685)
I am following the guide with:

#Install Packages:
opkg update ; opkg install openvpn-openssl luci-app-openvpn openssl-util

#Download openssl.cnf:
    # Save as /etc/ssl/openssl.cnf
    cd /etc/ssl ; mkdir -p ca/csr crl openvpn/clients
    echo 00 > serial
    echo 00 > crl/crlnumber

    touch index
    touch rand

openssl req -x509 -new -sha512 -days 3650 -newkey rsa:4096 -keyout CA.key.pem -out CA.crt.pem -config ./openssl.cnf -extensions v3_ca -nodes
Error is:
1998245048:error:0E079065:lib(14):func(121):reason(101):NA:0:line 920

My openssl.cnf, only my hanges are:

next changes made:
Line 183: DNS.1 = Router.1 Change Router.1 => DNS.1 = weteling
Line188: DNS.1 = Router.2 Change Router.2 => DNS.1 = vanspaen
all DNS1 and DNS2 added with isp dns1 and isp dns2
all replaced with and dns 1 etc replaced with isp dns