[Warning] [omni.usd] Warning: in SdfPath at line 81 of W:\ac88d7d902b57417\USD\pxr\usd\sdf\path.cpp -- Ill-formed SdfPath <>: syntax error

This warning happens when I use the action graph to control my robot arm


I used two make_array to achieve that,One is the joint name Tokens,the other is the position command.
the robot won’t move and the terminal keeps warning me same issue.
Can anybody tell me what causes this trouble?

Even I’m stuck with the same issue. Can you share how you fixed it?