set_autopilot() error in carla0.9.15

[ccconquer]

I searched for information online, and some people suggested that the default port 8000 might be occupied. However, I tried many different ports and still encountered the error. What could be causing the error 'RuntimeError: trying to create rpc server for traffic manager; but the system failed to create because of bind error'?

Traceback (most recent call last): File "/mnt/home/zhuyanting/CARLA_0.9.15/PythonAPI/202404/0425BaseAPI.py", line 106, in main() File "/mnt/home/zhuyanting/CARLA_0.9.15/PythonAPI/202404/0425BaseAPI.py", line 52, in main ego_vehicle.set_autopilot(True, 2002) RuntimeError: trying to create rpc server for traffic manager; but the system failed to create because of bind error.