OSError: [Errno 99] Cannot assign requested address about matrix-registration HOT 7 CLOSED

root@vmd76330:~# matrix-registration --config-path /etc/matrix-synapse/registration/config.yaml serve
Traceback (most recent call last):
  File "/usr/local/bin/matrix-registration", line 8, in <module>
    sys.exit(cli())
  File "/usr/local/lib/python3.9/dist-packages/click/core.py", line 829, in __call__
    return self.main(*args, **kwargs)
  File "/usr/local/lib/python3.9/dist-packages/flask/cli.py", line 586, in main
    return super(FlaskGroup, self).main(*args, **kwargs)
  File "/usr/local/lib/python3.9/dist-packages/click/core.py", line 782, in main
    rv = self.invoke(ctx)
  File "/usr/local/lib/python3.9/dist-packages/click/core.py", line 1259, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/usr/local/lib/python3.9/dist-packages/click/core.py", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/usr/local/lib/python3.9/dist-packages/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/usr/local/lib/python3.9/dist-packages/click/decorators.py", line 21, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "/usr/local/lib/python3.9/dist-packages/flask/cli.py", line 426, in decorator
    return __ctx.invoke(f, *args, **kwargs)
  File "/usr/local/lib/python3.9/dist-packages/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/usr/local/lib/python3.9/dist-packages/click/decorators.py", line 73, in new_func
    return ctx.invoke(f, obj, *args, **kwargs)
  File "/usr/local/lib/python3.9/dist-packages/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/usr/local/lib/python3.9/dist-packages/matrix_registration/app.py", line 58, in run_server
    serve(app, host=config.config.host, port=config.config.port, url_prefix=config.config.base_url)
  File "/usr/local/lib/python3.9/dist-packages/waitress/__init__.py", line 12, in serve
    server = _server(app, **kw)
  File "/usr/local/lib/python3.9/dist-packages/waitress/server.py", line 81, in create_server
    last_serv = TcpWSGIServer(
  File "/usr/local/lib/python3.9/dist-packages/waitress/server.py", line 239, in __init__
    self.bind_server_socket()
  File "/usr/local/lib/python3.9/dist-packages/waitress/server.py", line 368, in bind_server_socket
    self.bind(sockaddr)
  File "/usr/local/lib/python3.9/dist-packages/waitress/wasyncore.py", line 398, in bind
    return self.socket.bind(addr)
OSError: [Errno 99] Cannot assign requested address