Xcodebuild failed with exit code 72

i use Katalon studio 5.3.0 and xcode 9.2 and follow this step https://docs.katalon.com/display/KD/Mobile+on+macOS

when doing this :

Open Terminal and enter following command to initialize WebDriverAgent project:

cd /usr/local/lib/node_modules/appium/node_modules/appium``-xcuitest``-driver``/WebDriverAgent

mkdir -p Resources/WebDriverAgent.bundle

sh ./Scripts/bootstrap.sh -d

showed exit code 72

Anyone can help me what’s wrong with that?

I can connect my android device in macbook using katalon studio, but can’t connect iphone to katalon studio.

Thank you