Failed to Add New Drag Trajectory #15
Description
Hello, I have encountered a problem. When I run the code on the server and try to add a new drag trajectory on the local webpage, the mouse pointer does not change to the plus sign shape as it should, and there is no response on the image when I click to add the trajectory. Can you help me find out what the problem is?
It is guaranteed that I have followed the instructions in the following figure.
