Wifi inactive on new gateway

My old gateway died while I was at work. Replaced it with new one from the store, no problem. Activation went smooth, and wired ethernet connection works fine.

However, WiFi will not activate, and the WiFi network will not show up  on any device. If I log into the gateway using 10.0.0.1, there are 2 identical WiFi networks listed as "inactive". If i Enable either one, it will stay enabled for around 20 seconds before automatically disabling itself. During this 15-25 seconds wifi devices can connect to the network, but are immediately disconnected until I reactivate from the gateway website and the whole process happens again.

Screenshots included.

https://imgur.com/a/Hol1Nl2