My router is an ASUS RT-AX88U Pro
I did get it solved. For posterity, here are the things I tried that did NOT fix it:
-Upgraded panel firmware to latest
-Forgot and added network
-Restarted panel
-Confirmed using WPA2 and that the password was correct
-Used a simpler password on the WiFi network
-Upgraded router firmware
-Restarted router
-Relocated the router closer to the panel
-Disabling 5G on router and panel
The one thing that worked was pressing the “Frequency” button at the bottom of the wireless network selection screen and disabling “PMF”. As soon as you do this it immediately authenticates and connects. You can recheck this box and it’s fine unless it loses the connection to the network. If it does, it will show “Saved” until the “PMF” box is unchecked. As such, I’m leaving that option off on the panel.
Note that the remote panel does not have this problem.