Wifi suddenly not functioning, ethernet still working fine

Wifi network disappeared from the list of available networks yesterday. Both desktops are connected to the internet via ethernet, and are still working fine, but laptops, gaming consoles, cellphones all lost connection.

I reset the gateway (an Arris model TG3482G leased from Comcast) but the issue remained the same. Logged in to 10.0.0.1 to see if a setting had gotten changed, but my network is not listed, and my wifi link status is listed as inactive. I tried re-enabling the wifi network under Connections->Status->Private Wi-Fi Network Configuration, but after saving changes it reverts to being disabled.

Not sure what to do from there.