I also got this error message.
The connection worked.
ComputerName : peerchat.server.cnc-online.net RemoteAddress : 185.17.144.132 RemotePort : 6667 InterfaceAlias : vEthernet (dockerswitch) SourceAddress : 192.168.0.2 TcpTestSucceeded : True
I figured it out for me. For me the solution was to go into zero hour settings, and change the Internet IP to the correct one.