After update Home assistant is no longer accessible, observer Supervisor: Disconnected

Installation Home Assistant OS
1

Good evening, please help.
Yesterday evening I wanted to perform an OS update. after that the system was no longer accessible today. now I have the information ‘observer
Supervisor: Disconnected’.
What can I do now to save the system and still be able to start it?

thanks in advance

2

Can you attach a screen and keyboard to your HA OS system ?

3

tomorrow yes, putty with telnet or ssh is actuel not working.
is there such a solution?

4

That is expected, if supervisor does not start, the SSH add-on will not be started too.

5

with a screen and a keyboard I will be able to login?

6

Depends on what you see on that screen. First diagnose, then repair.

7

thank you, so I will see tomorrow more
thank you

8

20250307_075107973_iOS
20250307_075107973_iOS1920×1440 124 KB

that is my screen
without connected netweork cable

9

Looks like you’re on the beta channel (Home Assistant Core 2025.3.0b4).

Might be an issue with the beta branch you’re on (judging by the ob4 in your version). Can you connect an ethernet cable and move to the release branch? use ha core update --version 2025.3.0

10

You need to restart HA with a connected ethernet cable, otherwise the observer will always say ‘Disconnected’

11

Thank you. How can I downgrade to an old Version?

12

Thank you, after a few attempts it works again I Hope at the moment