when use get_jacobian meet error

[ccccccc-lab]

Dear all,
I wanted to use the “get_jacobian” function to perform jacobian calculations for the current state of the robot, but he reported the following error.
My code is:

And，the detail error is:

I desperately need help，thank you so much.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.