HA after boot - File configuration.yaml not found

Hi,
i’m quite new with HA, i’ve played a little with DateTime Sensor in configuration.yaml with Studio Code.
Then i want to insert a AddOn but the the Addon Stays empty (white). So does Terminal or Raspberrymatic …
So i’ve booted the HA on my PI4 but does not help.
If opening the LOG this message appears: Error while loading page logbook.
So i opened the notifications on the lower left panel and found several entrys but this may cause the problem?

Can't read Supervisor data:
09:08:06 – (WARNUNG) Home Assistant Supervisor
Client error on /host/info request Cannot connect to host 172.30.32.2:80 ssl:default [Connect call failed ('172.30.32.2', 80)]
09:08:06 – (FEHLER) Home Assistant Supervisor - Die Nachricht ist zum ersten Mal um 09:07:30 aufgetreten und erscheint 7 mal
Connection pool is full, discarding connection: 192.168.1.100
09:07:52 – (WARNUNG) /usr/local/lib/python3.9/site-packages/urllib3/connectionpool.py - Die Nachricht ist zum ersten Mal um 09:07:22 aufgetreten und erscheint 43 mal
[547046390464] The system cannot restart because the configuration is not valid: File configuration.yaml not found.
09:07:35 – (FEHLER) Home Assistant WebSocket API
The system cannot restart because the configuration is not valid: File configuration.yaml not found.
09:07:35 – (FEHLER) Home Assistant Supervisor
Failed to to call /supervisor/available_updates -
09:07:30 – (FEHLER) Home Assistant Supervisor
Unhandled exception
09:07:18 – (FEHLER) /usr/local/lib/python3.9/site-packages/aiohttp/web_protocol.py - Die Nachricht ist zum ersten Mal um 09:07:18 aufgetreten und erscheint 2 mal
Logger: homeassistant.components.websocket_api.http.connection
Source: components/hassio/__init__.py:599
Integration: Home Assistant WebSocket API (documentation, issues)
First occurred: 09:07:35 (1 occurrences)
Last logged: 09:07:35

[547046390464] The system cannot restart because the configuration is not valid: File configuration.yaml not found.
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/components/websocket_api/commands.py", line 185, in handle_call_service
    await hass.services.async_call(
  File "/usr/src/homeassistant/homeassistant/core.py", line 1495, in async_call
    task.result()
  File "/usr/src/homeassistant/homeassistant/core.py", line 1530, in _execute_service
    await handler.job.target(service_call)
  File "/usr/src/homeassistant/homeassistant/components/hassio/__init__.py", line 599, in async_handle_core_service
    raise HomeAssistantError(
homeassistant.exceptions.HomeAssistantError: The system cannot restart because the configuration is not valid: File configuration.yaml not found.

also i can not start the Back/Restore cause the side is also empty

I’ve got the problem during reboot. See what Google has to say about this :pensive: