You’re right. I was thinking of a recent Dan post where he primarily listed WPA2 and “a few others.”
This must be the post you’re thinking of:
https://community.glowforge.com/t/new-router-glowforge-now-errors-out-on-connecting-to-wifi/21865/25?u=jbmanning5If I remember correctly, on my initial set up, I was on an open network and dual-broadcasting 2.4/5ghz under the same SSID (Nighthawk router). Initially, the forge didn’t even see my network so I typed in the SSID manually. I received a device error but after that it recognized the network when it scanned for networks. I received a device error a couple more times when trying to connect to the now-recognized-via-scan network and then it was just magically connected and started calibrating (with no huzzah, you’re connected message).