'Unable to start application on this device' error. packageAndLaunchActivityFromManifest failed.

Hi @satish1607,

You can check out this post which has some details on how to make sure that Katalon can see your devices. New installs of Xcode can change things with the simulators, so it might be a good idea to run through these (specifically starting at Install ios-deploy)

They may also help you if you want to try to upgrade to Katalon Studio 6.2.1 and Appium 1.12.1 again.

Hope this helps,

Chris