Unable to start app


I’m new to Katalon and I want to launch my first mobile test use mobile record.

But when I launch the sample projet I get this message :

Unable to start app at: ‘/Users/danielpanjaitan/Katalon Studio/MobileProjectTest/androidapp/APIDemos.apk’ (Root cause: org.openqa.selenium.WebDriverException: An unknown server-side error occurred while processing the command. Original error: Could not sign with default certificate. Original error Command ‘’/Applications/Katalon Studio.app/Contents/Eclipse/jre/Contents/Home/jre/bin/java’ -jar /usr/local/lib/node_modules/appium/node_modules/appium-adb/jars/sign.jar /usr/local/lib/node_modules/appium/node_modules/appium-uiautomator2-server/apks/appium-uiautomator2-server-v1.12.0.apk --override’ exited with code 1 (WARNING: The server did not provide any stacktrace information)

Command duration or timeout: 2.72 seconds

Build info: version: ‘3.7.1’, revision: ‘8a0099a’, time: ‘2017-11-06T21:07:36.161Z’

System info: host: ‘Daniels-MacBook-Pro.local’, ip: ‘fe80:0:0:0:ca8:b4ab:ae0:22b%en0’, os.name: ‘Mac OS X’, os.arch: ‘x86_64’, os.version: ‘10.13.6’, java.version: ‘1.8.0_181’

Driver info: driver.version: SwipeableAndroidDriver)

What should I do?

Thank you,


Screen Shot 2018-08-24 at 6.22.16 PM.png