"Browser is not opened" exception using Test Cloud

Browser is not opened exception when trying to execute test suite using test cloud in katalon studio. Below is the log error.

=============== ROOT CAUSE =====================
Caused by: com.kms.katalon.core.webui.exception.BrowserNotOpenedException: Browser is not opened

For trouble shooting, please visit: https://docs.katalon.com/katalon-studio/docs/troubleshooting.html

Elapsed time: 3.791s

(Root cause: com.kms.katalon.core.exception.StepFailedException: Unable to navigate to ‘’
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.NavigateToUrlKeyword.navigateToUrl(NavigateToUrlKeyword.groovy:83)
at com.kms.katalon.core.webui.keyword.builtin.NavigateToUrlKeyword.execute(NavigateToUrlKeyword.groovy:67)
at com.kms.katalon.core.keyword.internal.KeywordExecutor.executeKeywordForPlatform(KeywordExecutor.groovy:74)
at com.kms.katalon.core.webui.keyword.WebUiBuiltInKeywords.navigateToUrl(WebUiBuiltInKeywords.groovy:187)
at com.kms.katalon.core.webui.keyword.WebUiBuiltInKeywords$navigateToUrl$1.call(Unknown Source)
at com.kms.katalon.core.main.ScriptEngine.run(ScriptEngine.java:194)
at com.kms.katalon.core.main.ScriptEngine.runScriptAsRawText(ScriptEngine.java:119)
at com.kms.katalon.core.main.TestCaseExecutor.runScript(TestCaseExecutor.java:448)
at com.kms.katalon.core.main.TestCaseExecutor.doExecute(TestCaseExecutor.java:439)
at com.kms.katalon.core.main.TestCaseExecutor.processExecutionPhase(TestCaseExecutor.java:418)
at com.kms.katalon.core.main.TestCaseExecutor.accessMainPhase(TestCaseExecutor.java:410)
at com.kms.katalon.core.main.TestCaseExecutor.execute(TestCaseExecutor.java:285)
at com.kms.katalon.core.main.TestCaseMain.runTestCase(TestCaseMain.java:142)
at com.kms.katalon.core.keyword.builtin.CallTestCaseKeyword$_callTestCase_closure1.doCall(CallTestCaseKeyword.groovy:59)
at com.kms.katalon.core.keyword.builtin.CallTestCaseKeyword$_callTestCase_closure1.call(CallTestCaseKeyword.groovy)
at com.kms.katalon.core.keyword.internal.KeywordMain.runKeyword(KeywordMain.groovy:74)
at com.kms.katalon.core.keyword.builtin.CallTestCaseKeyword.callTestCase(CallTestCaseKeyword.groovy:81)
at com.kms.katalon.core.keyword.builtin.CallTestCaseKeyword.execute(CallTestCaseKeyword.groovy:44)
at com.kms.katalon.core.keyword.internal.KeywordExecutor.executeKeywordForPlatform(KeywordExecutor.groovy:74)
at com.kms.katalon.core.keyword.BuiltinKeywords.callTestCase(BuiltinKeywords.groovy:334)
at com.kms.katalon.core.main.ScriptEngine.run(ScriptEngine.java:194)
at com.kms.katalon.core.main.ScriptEngine.runScriptAsRawText(ScriptEngine.java:119)
at com.kms.katalon.core.main.TestCaseExecutor.runScript(TestCaseExecutor.java:448)
at com.kms.katalon.core.main.TestCaseExecutor.doExecute(TestCaseExecutor.java:439)
at com.kms.katalon.core.main.TestCaseExecutor.processExecutionPhase(TestCaseExecutor.java:418)
at com.kms.katalon.core.main.TestCaseExecutor.accessMainPhase(TestCaseExecutor.java:410)
at com.kms.katalon.core.main.TestCaseExecutor.execute(TestCaseExecutor.java:285)
at com.kms.katalon.core.common.CommonExecutor.accessTestCaseMainPhase(CommonExecutor.java:65)
at com.kms.katalon.core.main.TestSuiteExecutor.accessTestSuiteMainPhase(TestSuiteExecutor.java:151)
at com.kms.katalon.core.main.TestSuiteExecutor.execute(TestSuiteExecutor.java:106)
at com.kms.katalon.core.main.TestCaseMain.startTestSuite(TestCaseMain.java:185)
at com.kms.katalon.core.main.TestCaseMain$startTestSuite$0.call(Unknown Source)
at TempTestSuite1668179014465.run(TempTestSuite1668179014465.groovy:36)
Caused by: com.kms.katalon.core.webui.exception.BrowserNotOpenedException: Browser is not opened