I face the same issue.
The hs is connected to network - see picture from Advanced IP Scanner
When i check the observer - it seems ok - see the picture below
But on the port 8123 the connection is refused:
I have connected the device to my monitor using HDMI and on the log there was an error: “low voltage detected, date/time is not reliable.”
It looks the same is described her ein this thread: Network error on initial setup of Home Assistant Green
I am using official power adapter and seems it is broken.