SITL Quadplane fail to connect

Hi, I try quadplane in Simulation, it works fine initially but after a while, it can not connect anymore. I’ve tested in two computers but no luck. Other model such as plane, hexa, ect have no issue, only quadplane and xplane. Message in the Mission Planner Data view said " No heartbeat packages received" and Win sys said" port number out of range, you may need to extend_sitlState->_uart_path"
I think it may be somethings to do with the computer setting, but I don’t know where to adjust. Thanks for your help.

I solve this issue by uninstall Mission Planner and delete the Mission Planner folder in my document. Reinstall Mission Planner and all go well.