Nothing shown in rviz when doing hector_slam mapping tutorial

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Hi,

Maybe my question is a bit dump because I am very new to hector slam and even to ROS. I have installed ROS and hector slam (indigo). When I was trying to do the tutorial, after I typed roslaunch hector_slam_launch tutorial.launch and press enter, Rviz started fine with no error. I can rotate the grid and saw Global Status is in red text (no data feeding into Rviz).

Then I typed rosbag play Team_Hector_MappingBox_RoboCup_2011_Rescue_Arena.bag --clock in another console and there is no error shown. I could see the [RUNNING] line being showed and I guess the data is being fed to Rviz?

However, there is nothing shown in Rviz, I can still rotate the grid but there is no map being created. Also, I saw the Global Status became green and there was a check sign. I could also see the "ROS Elapsed" at the bottom is running.

When I added a TF, I could see two coordinates moving but there is just no map.

I saved the file to an alternative path (when I clicked save it said the file cannot be open, so I have to save a copy to another path). The content of the file is shown below:

Panels:
  - Class: rviz/Displays
    Help Height: 78
    Name: Displays
    Property Tree Widget:
      Expanded:
        - /Global Options1
        - /Status1
      Splitter Ratio: 0.5
    Tree Height: 565
  - Class: rviz/Selection
    Name: Selection
  - Class: rviz/Tool Properties
    Expanded:
      - /2D Pose Estimate1
      - /2D Nav Goal1
      - /Publish Point1
    Name: Tool Properties
    Splitter Ratio: 0.588679
  - Class: rviz/Views
    Expanded:
      - /Current View1
    Name: Views
    Splitter Ratio: 0.5
  - Class: rviz/Time
    Experimental: false
    Name: Time
    SyncMode: 0
    SyncSource: ""
Visualization Manager:
  Class: ""
  Displays:
    - Alpha: 0.5
      Cell Size: 1
      Class: rviz/Grid
      Color: 160; 160; 164
      Enabled: true
      Line Style:
        Line Width: 0.03
        Value: Lines
      Name: Grid
      Normal Cell Count: 0
      Offset:
        X: 0
        Y: 0
        Z: 0
      Plane: XY
      Plane Cell Count: 10
      Reference Frame: <Fixed Frame>
      Value: true
    - Angle Tolerance: 0.1
      Class: rviz/Odometry
      Color: 255; 25; 0
      Enabled: true
      Keep: 100
      Length: 1
      Name: Odometry
      Position Tolerance: 0.1
      Topic: ""
      Value: true
    - Class: rviz/TF
      Enabled: false
      Frame Timeout: 15
      Frames:
        All Enabled: true
      Marker Scale: 1
      Name: TF
      Show Arrows: true
      Show Axes: true
      Show Names: true
      Tree:
        {}
      Update Interval: 0
      Value: false
  Enabled: true
  Global Options:
    Background Color: 48; 48; 48
    Fixed Frame: map
    Frame Rate: 30
  Name: root
  Tools:
    - Class: rviz/Interact
      Hide Inactive Objects: true
    - Class: rviz/MoveCamera
    - Class: rviz/Select
    - Class: rviz/FocusCamera
    - Class: rviz/Measure
    - Class: rviz/SetInitialPose
      Topic: /initialpose
    - Class: rviz/SetGoal
      Topic: /move_base_simple/goal
    - Class: rviz/PublishPoint
      Single click: true
      Topic: /clicked_point
  Value: true
  Views:
    Current:
      Class: rviz/Orbit
      Distance: 16.2326
      Enable Stereo Rendering:
        Stereo Eye Separation: 0.06
        Stereo Focal Distance: 1
        Swap Stereo Eyes: false
        Value: false
      Focal Point:
        X: 0
        Y: 0
        Z: 0
      Name: Current View
      Near Clip Distance: 0.01
      Pitch: 0.350399
      Target Frame: <Fixed Frame>
      Value: Orbit (rviz)
      Yaw: 0.425397
    Saved: ~
Window ...