[ERROR] [1548249501.258685650]: Ignoring transform for child_frame_id "100" from authority "unknown_publisher" because of an invalid quaternion in the transform (0.000000 0.000000 0.000000 0.000000)

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When I learn the Motion Planning API in the Moveit tutorial, I followed the steps in the tutorial to run : roslaunch moveit_tutorials motion_planning_api_tutorial.launch,

but the following error occurred!

[ERROR] [1548250548.142620502]: Ignoring transform for child_frame_id "100" from authority "unknown_publisher" because of an invalid quaternion in the transform (0.000000 0.000000 0.000000 0.000000)

I hope everyone can give advice and give me some help.

Thank you!