@archana0393 It might be that you have not set the path to your appium installation inside katalon studio. Check where you have appium installed and which version you have (there are special instructions for setup if you want to use appium 2.0 or above) and then make sure you add the path to katalon preferences under Preferences → Katalon → Mobile.
@archana0393 How did you install appium? It looks like the installation was not successful so I would try to uninstall it and reinstall it again to see if that will fix the issue.