VPN and Cloudflare site

I am trying to access a site called www.ncgunowners.com  This site uses Cloudflare as a gateway to verify IP addresses for its users.  Unfortunately, I'm usually locked out of the site and receive this error message:

"Access denied
Error code 1020
You do not have access to www.ncgunowners.com.
The site owner may have set restrictions that prevent you from accessing the site."

In conversations with support staff for the site and others on the site (forums on the site), we've determined that it is my NORTON VPN that's causing problems with the site.  For the life of me, however, I can't figure out how to fix this.  Do I make a change in Norton's VPN, making VPN effectively "off" for the site (is that possible?)?  Do I change the VPN region?

I know it's the VPN that is causing this too by virtue of the fact that I'm running two desktop computers side-by-side on the same network using the same internet connection, the same Norton subscription, etc.  The only difference is that one machine has VPN set to "off"; the other has it set to "on".

Thank you for your help!

Maybe, NCGO vendors/advertisers want to know your true location.  
Maybe, Second Media Inc wants to know your true location. 
Maybe, NCGO Forum software by XenForo™ blocks VPN/proxies for Cloudflare sites.

I know Xenforo forum sites have a paid addon which can block VPN/proxies for Cloudflare sites as it also makes use of GetIPIntel data

https://community.cloudflare.com/t/blocking-vpns-and-proxies/38421


I’m getting Access denied Error code 1020
[...]

Cloudflare does not block anything by default, but the website owner, who very likely is a Cloudflare customer, very likely configured Cloudflare to do so.

At Cloudflare you have many options to block. You can filter for ASN, IP, IP ranges, country etc… and many more. But if you are blocked, then the website owners configured it to do so. Feel free to contact the website owner and ask him these questions:

[...]
If you want to have access to some sites, you will have to play by the rules the website owner sets up, not by the rules you want 

https://community.cloudflare.com/t/sites-blocking-vpn-ip-ranges-solution/410926 

Hello. It's the website not allowing access, because, a VPN is in use and your actual IP address is being masked. Companies do put restrictions on VPN access due to legal and other reasons. The only suggestion I can offer is to change your region in the VPN and retry. Otherwise the VPN would need to be set to OFF and not set to start with Windows.

SA