roslaunch r2_gazebo r2c_upperbody.launch ros_control:=true robodyn:=true Doesn't work, Gazebo fails to launch

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I followed the wiki page for setting up a Gazebo simulator, But after successful installation gazebo doesn't launch. wiki link : https://gitlab.com/nasa-jsc-robotics/... Here are the few observations I made.

1) Simulator does work for few of the files which starts from r2b_* but not r2c_*.

2) I do get a error when running files starting from r2c_* : Error [SDF.cc:789] Missing element description for [pointCloudCutoffMax]

I assumed it my be loading files and left it overnight and their was no change and gazebo never launched.

Please do help me launch the simulator and thanks in advance for the suggestions