RS in QTI 2.1 if author import a QTI 1.2 questions

<dispatchinfo>
	<componentinfo>
		<compname>ffo_main_item_list</compname>
		<compclass>org.olat.core.gui.components.form.flexible.impl.FormWrapperContainer</compclass>
		<extendedinfo>n/a</extendedinfo>
		<event>
			<class&gt;org.olat.core.gui.components.form.flexible.impl.FormEvent</class&gt;
			<command>done</command>
			<tostring>com:done,org.olat.core.gui.components.form.flexible.impl.FormEvent@2f23a1</tostring>
		</event>
	</componentinfo>
	<controllerinfo>
		<controllername>org.olat.modules.qpool.ui.ItemListMyListsController</controllername>
		<controllername>org.olat.modules.qpool.ui.SelectItemController</controllername>
		<controllername>org.olat.ims.qti21.ui.editor.AssessmentTestComposerController</controllername>
		<controllername>org.olat.ims.qti21.ui.QTI21RuntimeController</controllername>
		<controllername>org.olat.core.commons.fullWebApp.BaseFullWebappController</controllername>
	</controllerinfo>
</dispatchinfo> 

Throwable: java.lang.IllegalStateException

message:Lookup RootNodeLookup@1810505998(systemId=file:/HotCoffee/olatdatas/openolat_110_postgresql/bcroot/qpool/b5/48/1a/01/QTIEDITKPRIM91364185730648.xml,badResourceException=uk.ac.ed.ph.jqtiplus.reading.QtiXmlInterpretationException: XML parsing failed) was expected to have been successful,java.lang.IllegalStateException
 at uk.ac.ed.ph.jqtiplus.resolution.RootNodeLookup.extractAssumingSuccessful(RootNodeLookup.java:146)
 at org.olat.ims.qti21.ui.editor.AssessmentTestComposerController.doInsert(AssessmentTestComposerController.java:663)
 at org.olat.ims.qti21.ui.editor.AssessmentTestComposerController.event(AssessmentTestComposerController.java:392)
 at org.olat.core.gui.control.DefaultController$1.run(DefaultController.java:246)
 at org.olat.core.logging.activity.ThreadLocalUserActivityLoggerInstaller.runWithUserActivityLogger(ThreadLocalUserActivityLoggerInstaller.java:108)
 at org.olat.core.gui.control.DefaultController.dispatchEvent(DefaultController.java:243)
 at org.olat.core.gui.control.DefaultController.fireEvent(DefaultController.java:190)
 at org.olat.modules.qpool.ui.SelectItemController.event(SelectItemController.java:107)
 at org.olat.core.gui.control.DefaultController$1.run(DefaultController.java:246)