Netunnel client connect server through proxy

[hvq0306]

Describe the Bug
Error occurs when client connects to server through proxy:

2022-11-07 15:26:10,758 netunnel_client - DEBUG - Connecting to `http://myexampleserver.com`
2022-11-07 15:26:10,848 netunnel_client - DEBUG - Starting channel `1`. Server version: `1.0.10`
Traceback (most recent call last):
  File "/usr/local/lib/python3.9/runpy.py", line 197, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "/usr/local/lib/python3.9/runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "/usr/local/lib/python3.9/site-packages/netunnel/client.py", line 580, in <module>
    loop.run_until_complete(main())
  File "/usr/local/lib/python3.9/asyncio/base_events.py", line 642, in run_until_complete
    return future.result()
  File "/usr/local/lib/python3.9/site-packages/netunnel/client.py", line 555, in main
    async with NETunnelClient(server_url=args.server, proxy_url=args.proxy_url, proxy_username=args.proxy_username,
  File "/usr/local/lib/python3.9/site-packages/netunnel/client.py", line 515, in __aenter__
    await self.connect()
  File "/usr/local/lib/python3.9/site-packages/netunnel/client.py", line 191, in connect
    websocket: EventClientWebSocketResponse = await websocket_async_context_manager.__aenter__()
  File "/usr/local/lib/python3.9/site-packages/aiohttp/client.py", line 1141, in __aenter__
    self._resp = await self._coro
  File "/usr/local/lib/python3.9/site-packages/aiohttp/client.py", line 795, in _ws_connect
    raise WSServerHandshakeError(
aiohttp.client_exceptions.WSServerHandshakeError: 400, message='Invalid response status', url=URL('http://myexampleserver.com/channels/1/connect')

The client command:
python3.9 -m netunnel.client --remote-port 22 --remote-address 172.0.0.1 --server "http://myexampleserver.com" --proxy-url "http://proxy_host:3128" -d

Netunnel version
1.0.10

Python version
3.9.9

Environment
Server: Centos 7.9
Client: Centos 7.7
Netunnel client and Netunnel server are not in the same network.