Katalon.core.exception "Unable to click on object"

Hi Team,
I’m trying to automate a test, but I have this error “Katalon.core.exception.StepFailedException: Unable to click on object”

09-02-2019 01:17:27 PM Test Cases

Elapsed time: 16,715s

Test Cases. Dashboard FAILED.

Reason:

com.kms.katalon.core.exception.StepFailedException: Unable to click on object ‘Object Repository/Dashboard Sh/Page/a_S’

at com.kms.katalon.core.webui.keyword.internal.WebUIKeywordMain.stepFailed(WebUIKeywordMain.groovy:64)

at com.kms.katalon.core.webui.keyword.internal.WebUIKeywordMain.runKeyword(WebUIKeywordMain.groovy:26)

at com.kms.katalon.core.webui.keyword.builtin.ClickKeyword.click(ClickKeyword.groovy:86)

at com.kms.katalon.core.webui.keyword.builtin.ClickKeyword.execute(ClickKeyword.groovy:67)

at com.kms.katalon.core.keyword.internal.KeywordExecutor.executeKeywordForPlatform(KeywordExecutor.groovy:56)

at com.kms.katalon.core.webui.keyword.WebUiBuiltInKeywords.click(WebUiBuiltInKeywords.groovy:616)

at com.kms.katalon.core.webui.keyword.WebUiBuiltInKeywords$click$3.call(Unknown Source)

at 2. Dashboard.run(2. Dashboard:26)

at com.kms.katalon.core.main.ScriptEngine.run(ScriptEngine.java:194)

at com.kms.katalon.core.main.ScriptEngine.runScriptAsRawText(ScriptEngine.java:119)

at com.kms.katalon.core.main.TestCaseExecutor.runScript(TestCaseExecutor.java:337)

at com.kms.katalon.core.main.TestCaseExecutor.doExecute(TestCaseExecutor.java:328)

at com.kms.katalon.core.main.TestCaseExecutor.processExecutionPhase(TestCaseExecutor.java:307)

at com.kms.katalon.core.main.TestCaseExecutor.accessMainPhase(TestCaseExecutor.java:299)

at com.kms.katalon.core.main.TestCaseExecutor.execute(TestCaseExecutor.java:233)

at com.kms.katalon.core.main.TestCaseMain.runTestCase(TestCaseMain.java:114)

at com.kms.katalon.core.main.TestCaseMain.runTestCase(TestCaseMain.java:105)

at com.kms.katalon.core.main.TestCaseMain$runTestCase$0.call(Unknown Source)

at TempTestCase1567423044544.run(TempTestCase1567423044544.groovy:21)

Caused by: org.openqa.selenium.ElementClickInterceptedException: Element <a href=“https://…/list/”> is not clickable at point (120,371) because another element <div class=“preloader”> obscures it

I’m a beginner with Katalon, thanks to all