As long as the server of the futures company is open, you can log in, and because there is no transaction on the weekend, it is not excluded that the futures company will use this time to settle accounts or sort out data.

He doesn't have to leave it on 24 hours anyway. Besides, it's useless for you to go online at this time. All services are suspended. You can check your network connection and try to change several servers when choosing the login server. Maybe nothing else is off.