Some wireless access points / routers restrict access to Lan devices by default. You should be able to change this.

It’s also possible you have your wireless access point set up incorrectly if it isn’t your main router. Is your wifi devices on a different subnet? Is the WAP running a dhcp server? Did you plug your Lan cable into the wan port on it instead of one of switching ports?

If you can ping the server from a wifi device then it’s a server configuration issue. Is your NC instance binding to local host or the static ip? 0.0.0.0 would work too.