Fail to render: sawyer robot has blank screen

[spacegoing]

I had a fresh install of this repo and tried rendering Sawyer robot with

visualize.py

https://github.com/ARISE-Initiative/robosuite/blob/master/robosuite/demos/demo_renderers.py
and
https://github.com/ARISE-Initiative/robosuite/blob/master/robosuite/demos/demo_video_recording.py

All these scripts failed to render sawyer robot.

I tried
https://github.com/ARISE-Initiative/robosuite/blob/master/robosuite/demos/demo_renderers.py
and
https://github.com/ARISE-Initiative/robosuite/blob/master/robosuite/demos/demo_video_recording.py
with the other robots. All robots and scenes work, except for Sawyer robot didn't work for any scenes.

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I'd also love to know how to visualize two gifs in readme. many thanks!