Ardupilot SITL- build fail please help

I want to ardupilot SITL simulator.
I’m following this video -

During the build process, I get an error like a picture when I first run -w, and I want to know the solution.

look like you are using the wrong mavlink version.

did you do

git submodule update --init --recursive

Yes I did it. should I try again?

Yes, please do. Repeat until it works