CARLA reports error rpc server
Trying to do some research on autopilot with carla,When running the example，error:
RuntimeError: trying to create rpc server for traffic manager; but the system failed to create because of bind error.
Possible reasons for this issue: The last time the PythonAPI was run was not properly terminated,causing some resources or ports Occupied.

Solution：
1）Restart carla;
2）If the error is still reported after restarting carla, Then restart the computer.