Thanks for the reply. For some reason, the instant.arubanetworks.com has been changed. It now defaults to rapconsole.arubanetworks.com when I type in the IP assigned by DHCP. The only browser error is "Make sure you have the right web address". No cert errors.
I have tried the factory reset twice with no change.
The WLAN LED is not lit, not even amber.
And as far as I know, it is or was configured in the default configuration.
It worked perfectly before the upgrade.