I wanted to make android project with godot. So I watched android export tutorial video. But I keep getting error that saying missing Android 'build-tools' directory. I don't even know what 'build-tools' directory is. Please help me :(

The video: https://www.youtube.com/watch?v=dCLYMF32ZBE
I tried to find the location of 'build-tools' directory and see it was really missing. I tried to follow official godot android export tutorial but it turns out that same to the video.