How to use Joint GUI in Gazebo?

[Harvin]

Hi,

Thanks for nice repo, I'd like to use the joints GUI to control your actuators directly. I have tried
roslaunch champ_config gazebo.launch
and then
roslaunch champ_bringup joints_gui.launch
but when I use the GUI, the error happens like:

[ERROR] [1660890605.413479051, 34.396000000]: Cannot create trajectory from message. It does not contain the expected joints.
[ERROR] [1660890605.829792883, 34.496000000]: Cannot create trajectory from message. It does not contain the expected joints.
[ERROR] [1660890606.227049291, 34.596000000]: Cannot create trajectory from message. It does not contain the expected joints.
[ERROR] [1660890606.635521507, 34.696000000]: Cannot create trajectory from message. It does not contain the expected joints.
[ERROR] [1660890607.041040125, 34.796000000]: Cannot create trajectory from message. It does not contain the expected joints.
[ERROR] [1660890607.457214266, 34.896000000]: Cannot create trajectory from message. It does not contain the expected joints.
[ERROR] [1660890607.857144049, 34.996000000]: Cannot create trajectory from message. It does not contain the expected joints.
[ERROR] [1660890608.255389087, 35.096000000]: Cannot create trajectory from message. It does not contain the expected joints.

Am I missing something? Looking forward to your answer, thanks.