Please have a look at the following post, and try to get chromedriver.log somehow.
Once you get the chromedriver.log, you will find such a log message in it for example.
[1526012674.637][INFO]: Launching chrome: "C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" --disable-background-networking --disable-client-side-phishing-detection --disable-default-apps --disable-hang-monitor --disable-popup-blocking --disable-prompt-on-repost --disable-sync --disable-web-resources --enable-automation --enable-logging --force-fieldtrials=SiteIsolationExtensions/Control --ignore-certificate-errors --load-extension="C:\Katalon_Studio_Windows_64-5.4.1\configuration\resources\extensions\Chrome\Object Spy,C:\Users\username\AppData\Local\Temp\scoped_dir10832_12653\internal" --log-level=0 --metrics-recording-only --no-first-run --password-store=basic --remote-debugging-port=12067 --test-type=webdriver --use-mock-keychain --user-data-dir="C:\Users\username\AppData\Local\Temp\scoped_dir10832_25782" data:,
This is the exact command line which ChromeDriver executed to start Chrome browser. In other words, this line shows here Katalon Studio expects Chrome browser is installed. Please check if the chrome.exe is there as the command line expects.