Just unpacked a new Keyboard (61MK3)
Did connect and showed Serial to enter in Native Access.
Did that, still shows to add serial.
Downloaded updater
Started updater
Error message in updater and ask to disconnect device an try again.
Did that severak times. Same error messages
Now Update says "Stand by while …is being updated" for 20 minutes already
Keyboard still shows error message "..something went wrong"
Seems bricked.