Error while loading dashboard

Hey there,
just installed HA on my Raspberry pi 3b+.
worked fine for about 30 Minutes, after that i get an error while loading the Dashboard:
Error while loading page lovelace.

i can still connect via the App and looked through the Logs and found the following entry:

Logger: aiohttp.server
Source: components/websocket_api/http.py:178 
First occurred: 21:53:30 (3 occurrences) 
Last logged: 21:53:31

Error handling request
Traceback (most recent call last):
  File "/usr/local/lib/python3.10/site-packages/aiohttp/web_protocol.py", line 435, in _handle_request
    resp = await request_handler(request)
  File "/usr/local/lib/python3.10/site-packages/aiohttp/web_app.py", line 504, in _handle
    resp = await handler(request)
  File "/usr/local/lib/python3.10/site-packages/aiohttp/web_middlewares.py", line 117, in impl
    return await handler(request)
  File "/usr/src/homeassistant/homeassistant/components/http/security_filter.py", line 60, in security_filter_middleware
    return await handler(request)
  File "/usr/src/homeassistant/homeassistant/components/http/forwarded.py", line 100, in forwarded_middleware
    return await handler(request)
  File "/usr/src/homeassistant/homeassistant/components/http/request_context.py", line 28, in request_context_middleware
    return await handler(request)
  File "/usr/src/homeassistant/homeassistant/components/http/ban.py", line 82, in ban_middleware
    return await handler(request)
  File "/usr/src/homeassistant/homeassistant/components/http/auth.py", line 236, in auth_middleware
    return await handler(request)
  File "/usr/src/homeassistant/homeassistant/components/http/view.py", line 136, in handle
    result = await result
  File "/usr/src/homeassistant/homeassistant/components/websocket_api/http.py", line 52, in get
    return await WebSocketHandler(request.app["hass"], request).async_handle()
  File "/usr/src/homeassistant/homeassistant/components/websocket_api/http.py", line 178, in async_handle
    await wsock.prepare(request)
  File "/usr/local/lib/python3.10/site-packages/aiohttp/web_ws.py", line 138, in prepare
    payload_writer = await super().prepare(request)
  File "/usr/local/lib/python3.10/site-packages/aiohttp/web_response.py", line 421, in prepare
    return await self._start(request)
  File "/usr/local/lib/python3.10/site-packages/aiohttp/web_response.py", line 429, in _start
    await self._write_headers()
  File "/usr/local/lib/python3.10/site-packages/aiohttp/web_response.py", line 502, in _write_headers
    await writer.write_headers(status_line, self._headers)
  File "/usr/local/lib/python3.10/site-packages/aiohttp/http_writer.py", line 131, in write_headers
    self._write(buf)
  File "/usr/local/lib/python3.10/site-packages/aiohttp/http_writer.py", line 76, in _write
    raise ConnectionResetError("Cannot write to closing transport")
ConnectionResetError: Cannot write to closing transport