RS in notifications portlet

2016-01-10 18:46:30,471 [ajp-bio-8009-exec-284] ERROR OLATRuntimeException - OLAT::ERROR ^%^ N1-E86 
Mozilla/5.0 (Windows NT 10.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.73 Safari/537.36 OPR/34.0.2036.25 ^%^ **RedScreen**
>>> 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:536)
   at org.olat.core.gui.components.Window.doDispatchRequest(Window.java:234)
   at org.olat.core.gui.components.AbstractComponent.dispatchRequest(AbstractComponent.java:193)
   at org.olat.dispatcher.AuthenticatedDispatcher.processValidDispatchURI(AuthenticatedDispatcher.java:245)
   at org.olat.dispatcher.AuthenticatedDispatcher.execute(AuthenticatedDispatcher.java:201)
   at org.olat.core.servlets.OpenOLATServlet.executeUserRequest(OpenOLATServlet.java:280)
   at org.olat.core.servlets.OpenOLATServlet.doPost(OpenOLATServlet.java:223)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
>>> stack of 2.cause::java.lang.NullPointerException: null
-> at org.olat.core.commons.services.notifications.manager.NotificationsManagerImpl.getSubscribers(NotificationsManagerImpl.java:221)
   at org.olat.core.commons.services.notifications.NotificationHelper.getSubscriptionMap(NotificationHelper.java:69)
   at org.olat.core.commons.services.notifications.NotificationHelper.getSubscriptionMap(NotificationHelper.java:64)
   at org.olat.core.commons.services.notifications.ui.NotificationsPortletRunController.reloadModel(NotificationsPortletRunController.java:176)
   at org.olat.core.commons.services.notifications.ui.NotificationsPortletRunController.<init>(NotificationsPortletRunController.java:131)
   at org.olat.core.commons.services.notifications.ui.NotificationsPortlet.getInitialRunComponent(NotificationsPortlet.java:82)
   at org.olat.core.gui.control.generic.portal.PortletContainer.initializeRunComponent(PortletContainer.java:119)
   at org.olat.core.gui.control.generic.portal.PortalImpl.initPortlets(PortalImpl.java:208)
   at org.olat.core.gui.control.generic.portal.PortalImpl.<init>(PortalImpl.java:108)
   at org.olat.core.gui.control.generic.portal.PortalImpl.createInstance(PortalImpl.java:153)
   at org.olat.core.gui.control.generic.portal.PortalMainController.<init>(PortalMainController.java:93)