RS if configuration notices saved as string and not boolean

2017-02-06 15:26:51,371 [ajp-nio2-8005-exec-19] ERROR OLATRuntimeException - OLAT::ERROR ^%^ N5-E8 ^%^ org.olat.core.logging 

https://olat.xyz.ch/auth/RepositoryEntry/248152065/Editor/0 ^%^ Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko
**RedScreen** java.lang.String cannot be cast to java.lang.Boolean

<dispatchinfo>
	<componentinfo>
		<compname>command.preview</compname>
		<compclass>org.olat.core.gui.components.link.Link</compclass>
		<extendedinfo>n/a</extendedinfo>
		<event>
			<class&gt;org.olat.core.gui.control.Event</class&gt;
			<command>command.preview</command>
			<tostring>com:command.preview,org.olat.core.gui.control.Event@67e25844</tostring>
		</event>
	</componentinfo>
	<controllerinfo>
		<controllername>org.olat.course.nodes.iq.IQConfigurationController</controllername>
		<controllername>org.olat.course.nodes.iq.IQEditController</controllername>
		<controllername>org.olat.course.editor.EditorMainController</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: java.lang.String cannot be cast to java.lang.Boolean
-> 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:548)
   at org.olat.core.gui.components.Window.doDispatchRequest(Window.java:241)
   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:292)
   at org.olat.core.servlets.OpenOLATServlet.doPost(OpenOLATServlet.java:235)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
>>> stack of 2.cause::java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Boolean
-> at org.olat.modules.iq.IQDisplayController.init(IQDisplayController.java:321)
   at org.olat.modules.iq.IQDisplayController.<init>(IQDisplayController.java:150)
   at org.olat.modules.iq.IQManager.createIQDisplayController(IQManager.java:142)
   at org.olat.course.nodes.iq.IQConfigurationController.doPreview(IQConfigurationController.java:392)
   at org.olat.course.nodes.iq.IQConfigurationController.event(IQConfigurationController.java:293)
   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)
   at org.olat.core.gui.components.AbstractComponent.fireEvent(AbstractComponent.java:238)
   at org.olat.core.gui.components.link.Link.dispatch(Link.java:199)
   at org.olat.core.gui.components.link.Link.doDispatchRequest(Link.java:186)