RS: in course lectures for teachers, cancel the search

2019-09-09 10:38:31.664 [ajp-nio2-8067-exec-4] ERROR OLATRuntimeException ^%^ I811944-J4182 
org.olat.core.logging.OLATRuntimeException
https://openolat.xyz.ch/auth/RepositoryEntry/128417802/lectures/0
Mozilla/5.0 (Windows NT 10.0; WOW64; Trident/7.0; Touch; rv:11.0) like Gecko
**RedScreen** null
<dispatchinfo>
	<componentinfo>
		<compname>cancel</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>cancel</command>
			<tostring>com:cancel,org.olat.core.gui.control.Event@ae7a2e99</tostring>
		</event>
	</componentinfo>
	<controllerinfo>
		<controllername>org.olat.core.gui.components.form.flexible.impl.elements.FormCancel$1</controllername>
		<controllername>org.olat.modules.lecture.ui.TeacherOverviewSearchController</controllername>
		<controllername>org.olat.modules.lecture.ui.TeacherOverviewController</controllername>
		<controllername>org.olat.course.run.CourseRuntimeController</controllername>
		<controllername>org.olat.core.commons.fullWebApp.BaseFullWebappController</controllername>
	</controllerinfo>
</dispatchinfo>
Caused by: java.lang.NullPointerException
 at org.olat.modules.lecture.ui.TeacherOverviewController.getRows(TeacherOverviewController.java:101)
 at org.olat.modules.lecture.ui.AbstractTeacherOverviewController.loadModel(AbstractTeacherOverviewController.java:169)
 at org.olat.modules.lecture.ui.AbstractTeacherOverviewController.event(AbstractTeacherOverviewController.java:302)
 at org.olat.modules.lecture.ui.TeacherOverviewController.event(TeacherOverviewController.java:143)
 at org.olat.core.gui.control.DefaultController$1.run(DefaultController.java:250)
 at org.olat.core.logging.activity.ThreadLocalUserActivityLoggerInstaller.runWithUserActivityLogger(ThreadLocalUserActivityLoggerInstaller.java:108)
 at org.olat.core.gui.control.DefaultController.dispatchEvent(DefaultController.java:247)
 at org.olat.core.gui.control.DefaultController.fireEvent(DefaultController.java:194)
 at org.olat.modules.lecture.ui.TeacherOverviewSearchController.formCancelled(TeacherOverviewSearchController.java:121)
 at org.olat.core.gui.components.form.flexible.impl.FormBasicController.event(FormBasicController.java:421)
 at org.olat.core.gui.control.DefaultController.dispatchEvent(DefaultController.java:206)
 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.form.flexible.impl.FormWrapperContainer.fireFormEvent(FormWrapperContainer.java:131)
 at org.olat.core.gui.components.form.flexible.impl.Form.fireFormEvent(Form.java:717)
 at org.olat.core.gui.components.form.flexible.impl.elements.FormCancel$1.event(FormCancel.java:75)
 at org.olat.core.gui.control.DefaultController.dispatchEvent(DefaultController.java:206)
 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:205)
 at org.olat.core.gui.components.link.Link.doDispatchRequest(Link.java:192)
 at org.olat.core.gui.components.AbstractComponent.dispatchRequest(AbstractComponent.java:193)
 at org.olat.core.gui.components.Window.doDispatchToComponent(Window.java:1201)
 at org.olat.core.gui.components.Window.dispatchRequest(Window.java:398) ... 39 more