Guest Wifi Allow http access to Single IP on Local Network

I’d like Guest Wifi Users to be able to access a web server that resides on the Local Network that has a static IP assigned by the GL.Inet device (Not the Wan).

The Device is in Router Mode.

Is this possible? I tried adding a firewall rule but it doesn’t seem to help.

Internal IP MyStaticIP (ie,
External Ports: 80
Internal Ports:80
Protocol: TCP/UDP

Guest Wifi User is trying the URL with no success.

What is the subnet of the private and guest network?