Connection refused Error

[Hautien]

Exception in thread Elibot monitor thread,IP:192.168.1.200:
Traceback (most recent call last):
File "/usr/lib/python3.8/threading.py", line 932, in _bootstrap_inner
self.run()
File "/usr/lib/python3.8/threading.py", line 870, in run
self._target(*self._args, **self._kwargs)
File "/home/ahpc/.local/lib/python3.8/site-packages/elite/_monitor.py", line 144, in monitor_run
self.__first_connect()
File "/home/ahpc/.local/lib/python3.8/site-packages/elite/_monitor.py", line 101, in __first_connect
sock.connect((self.robot_ip, self._PORT))
ConnectionRefusedError: [Errno 111] Connection refused