System conflict problem

Good morning all,

When I add a nordvpn tcp file using the open vpn client tab and I want to link it. I have this message
“If you enabled VPN but the VPN cannot connect to its server, there will be NO Internet.
When you change server while VPN is connected, VPN will not be leaked.” and when I click on link "risk of system conflict and for once I don’t know what to do to solve the problem.

Thanks for the reponse

That is not a problem. It is a hint.