Not able to select sub menu

for example, products is the main menu , katalon studio sub menu

for example:
definitions of objects


script

import static com.kms.katalon.core.testobject.ObjectRepository.findTestObjectimport com.kms.katalon.core.webui.keyword.WebUiBuiltInKeywords as WebUIWebUI.openBrowser('https://forum.katalon.com/discussion/9030/not-able-to-select-sub-menu#latest')WebUI.waitForElementClickable(findTestObject('Object Repository/__Sandbox/MenuProducts'), 3)WebUI.click(findTestObject('Object Repository/__Sandbox/MenuProducts'))WebUI.waitForElementClickable(findTestObject('Object Repository/__Sandbox/MenuKatalonStudio'), 3)WebUI.click(findTestObject('Object Repository/__Sandbox/MenuKatalonStudio'))

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