[flaky test] Channel Manager page actions Part1 [second rerun]

When user opens the sidenav2.519java.lang.reflect.UndeclaredThrowableExceptionjava.lang.reflect.UndeclaredThrowableException
	at com.sun.proxy.$Proxy64.openSidenav(Unknown Source)
	at com.onehippo.cms.hap.community.qa.channelmanager.ChannelEditorSteps.inBrowserUserOpensTheSidenav(ChannelEditorSteps.java:342)
	at com.onehippo.cms.hap.community.qa.channelmanager.ChannelEditorSteps.userOpensTheSidenav(ChannelEditorSteps.java:337)
	at ✽.user opens the sidenav(file:///var/lib/jenkins/workspace/brxm_build_release_14.4/internal/hap/enterprise/integration-test-community/src/test/resources/com/onehippo/cms/hap/community/qa/channelmanager/PageActions_Part1.feature:226)
Caused by: java.lang.reflect.InvocationTargetException
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at com.onehippo.cms7.qa.selenium.invocationHandlers.IframeInvocationHandler.invoke(IframeInvocationHandler.java:28)
	at com.sun.proxy.$Proxy64.openSidenav(Unknown Source)
	at com.onehippo.cms.hap.community.qa.channelmanager.ChannelEditorSteps.inBrowserUserOpensTheSidenav(ChannelEditorSteps.java:342)
	at com.onehippo.cms.hap.community.qa.channelmanager.ChannelEditorSteps.userOpensTheSidenav(ChannelEditorSteps.java:337)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at io.cucumber.java.Invoker.invoke(Invoker.java:27)
	at io.cucumber.java.JavaStepDefinition.execute(JavaStepDefinition.java:27)
	at io.cucumber.core.runner.PickleStepDefinitionMatch.runStep(PickleStepDefinitionMatch.java:63)
	at io.cucumber.core.runner.TestStep.executeStep(TestStep.java:64)
	at io.cucumber.core.runner.TestStep.run(TestStep.java:49)
	at io.cucumber.core.runner.PickleStepTestStep.run(PickleStepTestStep.java:46)
	at io.cucumber.core.runner.TestCase.run(TestCase.java:51)
	at io.cucumber.core.runner.Runner.runPickle(Runner.java:67)
	at io.cucumber.junit.PickleRunners$NoStepDescriptions.run(PickleRunners.java:149)
	at io.cucumber.junit.FeatureRunner.runChild(FeatureRunner.java:83)
	at io.cucumber.junit.FeatureRunner.runChild(FeatureRunner.java:24)
	at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
	at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
	at io.cucumber.junit.Cucumber.runChild(Cucumber.java:185)
	at io.cucumber.junit.Cucumber.runChild(Cucumber.java:83)
	at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
	at org.apache.maven.surefire.junitcore.pc.Scheduler$1.run(Scheduler.java:405)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
Caused by: org.openqa.selenium.JavascriptException: javascript error: Cannot read property 'dispatchEvent' of null
  (Session info: headless chrome=84.0.4147.89)