Hi Raymond,
I don't know what is wrong. Try installing the script again.
Exit PisInsight, download the attached and save it in PixInsigth>src>scripts (overwrite the existing one)
Then start PI and it should work. If not or if you can't see the script, go to Script>Feature Scripts>Add and select the folder were you save it and click OK.
Hope it helps.
Saludos,
Alejandro.