On Opal, I get some error message and firmware is now v4.0.0

[admon]

@Menard

Fri Jan 24 00:06:28 2025 daemon.notice netifd: radio1 (1499): uci: Invalid argument
Fri Jan 24 00:06:28 2025 daemon.notice netifd: radio1 (1498): Command failed: Invalid argument
Fri Jan 24 00:06:28 2025 daemon.notice netifd: radio0 (1496): uci: Invalid argument
Fri Jan 24 00:06:28 2025 daemon.notice netifd: radio1 (1498): uci: Invalid argument
Fri Jan 24 00:06:28 2025 daemon.notice netifd: radio0 (1497): Command failed: Invalid argument

I would say that the config of the Wi-Fi is incompatible / something changed and the firmware (which uses hardcoded commands) isn't able to deal with that.

You can try those commands to fix

Slate AX Wireless Section inaccessible "Unknown error occurred" since updating

Thanks for your feedback. Please try to execute these commands in the SSH: uci set wireless.default_radio0.ifname='wlan1' uci set wireless.default_radio1.ifname='wlan0' uci set wireless.guest5g.ifname='wlan1-1' uci set wireless.guest2g.ifname='wlan0-1' uci commit wireless reboot

If they don't work or it gets worse, a full config reset is the best way to deal with that.