External Mode Open Protocol Connect command failed

Hello, everyone

I'm following examples of UAV Toolbox Support Package for PX4 Autopilots.

And i want to follow last examples(HITL).

https://kr.mathworks.com/help/supportpkg/px4/ref/qgc-hitl-example.html.html

I followed at task 2. and I did click Monitor & Tune button.

This error occurs.

The directory has only english.

I don't know why broken word appear.

What's the problem?

P.S. The example says connect serial 4 of pixhawk 1. and I have pixhawk 4.

I think serial 4 port of pixhawk 1 equals UART&I2C B port of pixhawk 4.

Is this right?