ERROR:websockets.server:Error in connection handler

Hi there
Aftere run the vosk server in a docker container by docker compose

Docker version 27.3.0, build e85edf8
```
vosk:
image: alphacep/kaldi-en:latest
ports:
- "2700:2700"
```

I try to connect the ws server by wscat

```
# wscat -c ws://0.0.0.0:2700
Connected (press CTRL+C to quit)
> qwerty
Disconnected (code: 1011, reason: "")
```

And after that I send an echo message the connection was closed by the error below

ERROR:websockets.server:Error in connection handler
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/websockets/server.py", line 191, in handler
await self.ws_handler(self, path)
File "/opt/vosk-server/websocket/./asr_server.py", line 69, in recognize
response, stop = await loop.run_in_executor(pool, process_chunk, rec, message)
File "/usr/lib/python3.9/concurrent/futures/thread.py", line 52, in run
result = self.fn(*self.args, **self.kwargs)
File "/opt/vosk-server/websocket/./asr_server.py", line 16, in process_chunk
elif rec.AcceptWaveform(message):
File "/usr/local/lib/python3.9/dist-packages/vosk-0.3.45-py3.9.egg/vosk/__init__.py", line 182, in AcceptWaveform
res = _c.vosk_recognizer_accept_waveform(self._handle, data, len(data))
TypeError: initializer for ctype 'char *' must be a bytes or list or tuple, not str