I have several 1852i's with one acting as the controller. Apparently over the weekend they took an update (The login page says copyright 2019 now) and none of them work. They don't broadcast SSID and the user/ password to log into mobility express now longer works. I can't ssh into them, or at least the credentials don't work there either. I unplug the 'master' and the next AP shows the login screen but with the same issues. Any ideas? They were working last week. (enclosed photo).
Thanks for you time