RS coaching tool if a group doesn't have any courses

2017-10-25 14:43:36,029 [ajp-nio2-8079-exec-5] ERROR OLATRuntimeException - OLAT::ERROR ^%^ N79-E1 ^%^ org.olat.core.logging 

https://sbs.olat.com/auth/CoachSite/0/Groups/0 ^%^ Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.62 Safari/537.36
**RedScreen** org.hibernate.exception.SQLGrammarException: could not extract ResultSet

<dispatchinfo>
	<componentinfo>
		<compname>table</compname>
		<compclass>org.olat.core.gui.components.table.Table</compclass>
		<extendedinfo>n/a</extendedinfo>
		<event>
			<class&gt;org.olat.core.gui.components.table.TableEvent</class&gt;
			<command>r</command>
			<tostring>cmd:r, rowId:1, actionId:select</tostring>
		</event>
	</componentinfo>
	<controllerinfo>
		<controllername>org.olat.core.gui.components.table.TableController</controllername>
		<controllername>org.olat.modules.coach.ui.GroupListController</controllername>
		<controllername>org.olat.modules.coach.ui.CoachMainController</controllername>
		<controllername>org.olat.core.commons.fullWebApp.BaseFullWebappController</controllername>
	</controllerinfo>
</dispatchinfo>

>>> stack of 1.cause::org.olat.core.logging.OLATRuntimeException: org.hibernate.exception.SQLGrammarException: could not extract ResultSet
-> 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:549)
   at org.olat.core.gui.components.Window.doDispatchRequest(Window.java:242)
   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:289)
   at org.olat.core.servlets.OpenOLATServlet.doPost(OpenOLATServlet.java:232
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
>>> stack of 2.cause::javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: could not extract ResultSet
-> at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:147)
   at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:155)
   at org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1423)
   at org.hibernate.query.Query.getResultList(Query.java:146)
   at org.olat.course.certificate.manager.CertificatesManagerImpl.getLastCertificates(CertificatesManagerImpl.java:549)
   at org.olat.modules.coach.ui.GroupController.loadModel(GroupController.java:236)
   at org.olat.modules.coach.ui.GroupController.<init>(GroupController.java:137)
   at org.olat.modules.coach.ui.GroupListController.selectGroup(GroupListController.java:200)
   at org.olat.modules.coach.ui.GroupListController.event(GroupListController.java:139)
   at org.olat.core.gui.control.DefaultController$1.run(DefaultController.java:246)
   at org.olat.core.logging.activity.ThreadLocalUserActivityLoggerInstaller.runWithUserActivityLogger(ThreadLocalUserActivityLoggerInstaller.java:108)
>>> stack of 3.cause::org.hibernate.exception.SQLGrammarException: could not extract ResultSet
-> at org.hibernate.exception.internal.SQLStateConversionDelegate.convert(SQLStateConversionDelegate.java:106)
   at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:42)
   at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:111)
   at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:97)
   at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.extract(ResultSetReturnImpl.java:80)
   at org.hibernate.loader.Loader.getResultSet(Loader.java:2123)
   at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1911)
   at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1887)
   at org.hibernate.loader.Loader.doQuery(Loader.java:932)
   at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:349) at org.hibernate.loader.Loader.doList(Loader.java:2615)
>>> stack of 4.cause::org.postgresql.util.PSQLException: ERROR: syntax error at or near ")"