Critical Error: `httpx.ConnectError: All connection attempts failed`

[keyready]

I was very excited about your project, but despite all my efforts, I couldn't launch it. I spent almost two hours trying to figure out why every request gets a 500th error. When I finally saw that I needed my own API_KEY and created it, the problem was not solved. Can anyone help with the solution of this problem?

last 10 lines from logs:

  File "C:\Users\vipko\AppData\Local\Programs\Python\Python311\Lib\site-packages\httpx\_client.py", line 1763, in _send_single_request
    response = await transport.handle_async_request(request)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\vipko\AppData\Local\Programs\Python\Python311\Lib\site-packages\httpx\_transports\default.py", line 372, in handle_async_request
    with map_httpcore_exceptions():
  File "C:\Users\vipko\AppData\Local\Programs\Python\Python311\Lib\contextlib.py", line 155, in __exit__
    self.gen.throw(typ, value, traceback)
  File "C:\Users\vipko\AppData\Local\Programs\Python\Python311\Lib\site-packages\httpx\_transports\default.py", line 86, in map_httpcore_exceptions
    raise mapped_exc(message) from exc
httpx.ConnectError: All connection attempts failed