when I try to create Room I get following Error

java.lang.NullPointerException

at com.sap.ip.collaboration.room.impl.RoomUMStorage.delete(RoomUMStorage.java:208)

at com.sap.ip.collaboration.room.impl.RoomObject.createUMGroups(RoomObject.java:2720)

at com.sap.ip.collaboration.room.impl.RoomObject.<init>(RoomObject.java:178)

at com.sap.ip.collaboration.room.impl.Rooms.createRoom(Rooms.java:179)

Anybody who can help if I am missing something.