LocalProtocolError: Can't send data when our state is ERROR

[sentry-io]

LocalProtocolError: Can't send data when our state is ERROR
(8 additional frame(s) were not displayed)
...
  File "starlette/responses.py", line 255, in stream_response
    await send(
  File "starlette/middleware/errors.py", line 159, in _send
    await send(message)
  File "uvicorn/protocols/http/h11_impl.py", line 490, in send
    output = self.conn.send(event=response)
  File "h11/_connection.py", line 512, in send
    data_list = self.send_with_data_passthrough(event)
  File "h11/_connection.py", line 527, in send_with_data_passthrough
    raise LocalProtocolError("Can't send data when our state is ERROR")