Overlap UVs throws Python error (list index out of range)

[jantin1]

I tried to move a group of UVs to overlap. I wanted to use the "Overlap UVs" button from the UV context menu -> oscurart, but the button throws error whenever I try it. I tried to select objects in the UV window and in the edit window; I have the Oscurart properties menu open. I'm working on Windows 10, GeForce GTX 1650 within Lenovo Legion laptop. I attach screenshot of the issue with the thrown error, could you please look into it?