NordVPN use a different set of credentials to log in to their website and to use their VPN with the InvizBox 2. This is why the credentials you use to log in to the NordVPN website will not work for all features of the InvizBox 2.
Click the following link to retrieve your OpenVPN & IKEv2/IPsec credentials: https://my.nordaccount.com/dashboard/nordvpn/
- Click "NordVPN" in the left hand 'Services' menu.
- Scroll down to 'Advanced Configuration' where you will find your username & password.
You can find out where to enter these VPN credentials on your InvizBox 2 in this article.