message: add optional chaining operator
diff: @@ -155,8 +155,8 @@ export default class RoomTile extends React.PureComponent<IProps, IState> {
  CommunityPrototypeStore.getUpdateEventName(this.props.room?.roomId),
  this.onCommunityUpdate,
  );
  - prevProps.room.off("Room.name", this.onRoomNameUpdate);
  - this.props.room.on("Room.name", this.onRoomNameUpdate);
  + prevProps.room?.off("Room.name", this.onRoomNameUpdate);
  + this.props.room?.on("Room.name", this.onRoomNameUpdate);
  }
  }
  