At your service, @fair trellis!
The IP address you have assigned to your server is not actually available for use on your machine. Node allocation creation is explained in the Wings install documentation: https://pterodactyl.io/wings/1.0/installing.html#node-allocations
Execute the command hostname -I | awk '{print $1}' and change your Node allocations to use this IP. Yes, it can be your internal/local IP when you're behind NAT. When behind NAT you will allocate the internal IP and connect using the public IP.
If you have added multiple public IPs to your network interface, you can view all of them using the command ip a | grep "inet "