@GianfrancoPa Hmmm, try adopt wirelessly and then downgrade firmware. I dont know what happendt to your access point strange thing and I have same switch, after switch update i have to restart all...

@MwaItou you have to tell all your device where controller is located. you can use dhcp option 138 or Omada discovery tool. if you have omada router you have to use discovery tool on router.

@GianfrancoPa I dont think its bricked. I do some test earlier and it always come online. Mybee you should hard reset and downgrade before you adopt..

@GianfrancoPa Try deactivate 2.4ghz and try to downgrade. I do that with success after some try an fail.

@colorado77 no. Non of routers who need controller have poe.

@Quist login to router in stand alone, set ip and username/password. then adopt router, it will fail first time, press retry and enter username and password you created in stand alone