QTI 2.1: possible RS in self test if the test hasn't a score saved

11:37:12,762 ERROR OLATRuntimeException:175 - **RedScreen**
<dispatchinfo>
	<componentinfo>
		<compname>luTreeRun</compname>
		<compclass>org.olat.core.gui.components.tree.MenuTree</compclass>
		<extendedinfo>n/a</extendedinfo>
		<event>
			<class&gt;org.olat.core.gui.components.tree.TreeEvent</class&gt;
			<command>ctncl</command>
			<tostring>TreeEvent:{cmd:ctncl, nodeid:95183055059233}</tostring>
		</event>
	</componentinfo>
	<controllerinfo>
		<controllername>org.olat.course.run.RunMainController</controllername>
		<controllername>org.olat.course.run.CourseRuntimeController</controllername>
		<controllername>org.olat.core.commons.fullWebApp.BaseFullWebappController</controllername>
	</controllerinfo>
</dispatchinfo>

>>>stack of 1.cause::org.olat.core.logging.OLATRuntimeException: null
-> at org.olat.core.gui.exception.ExceptionWindowController.<init>(ExceptionWindowController.java:116)
   at org.olat.core.gui.exception.MsgFactory.createMessageChiefController(MsgFactory.java:57)
   at org.olat.core.gui.exception.MsgFactory.createMessageChiefController(MsgFactory.java:46)
   at org.olat.core.gui.components.Window.dispatchRequest(Window.java:589)
   at org.olat.core.gui.components.Window.doDispatchRequest(Window.java:282)
   at org.olat.core.gui.components.AbstractComponent.dispatchRequest(AbstractComponent.java:193)
   at org.olat.dispatcher.AuthenticatedDispatcher.processValidDispatchURI(AuthenticatedDispatcher.java:273)
   at org.olat.dispatcher.AuthenticatedDispatcher.execute(AuthenticatedDispatcher.java:190)
   at org.olat.core.servlets.OpenOLATServlet.executeUserRequest(OpenOLATServlet.java:294)
   at org.olat.core.servlets.OpenOLATServlet.doPost(OpenOLATServlet.java:237)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:661)
>>>stack of 2.cause::java.lang.NullPointerException: null
-> at org.olat.course.nodes.IQSELFCourseNode.getUserScoreEvaluation(IQSELFCourseNode.java:379)
   at org.olat.course.nodes.iq.QTI21AssessmentRunController.initAssessment(QTI21AssessmentRunController.java:256)
   at org.olat.course.nodes.iq.QTI21AssessmentRunController.<init>(QTI21AssessmentRunController.java:183)
   at org.olat.course.nodes.IQSELFCourseNode.createNodeRunConstructionResult(IQSELFCourseNode.java:138)
   at org.olat.course.run.navigation.NavigationHandler.doEvaluateJumpTo(NavigationHandler.java:461)
   at org.olat.course.run.navigation.NavigationHandler.evaluateJumpToTreeNode(NavigationHandler.java:286)
   at org.olat.course.run.RunMainController.doNodeClick(RunMainController.java:666)
   at org.olat.course.run.RunMainController.event(RunMainController.java:525)
   at org.olat.core.gui.control.DefaultController.dispatchEvent(DefaultController.java:202)
   at org.olat.core.gui.components.AbstractComponent$1.run(AbstractComponent.java:240)
   at org.olat.core.logging.activity.ThreadLocalUserActivityLoggerInstaller.runWithUserActivityLogger(ThreadLocalUserActivityLoggerInstaller.java:108)