On command npc add
https://hastebin.com/owolobipig.md

On command /commandnpc
https://hastebin.com/jacanecufo.vbs

Tested on PaperSpigo, occurs the same:

On command npc add
https://hastebin.com/uzotateziz.md

On command /commandnpc
https://hastebin.com/izufeziliq.vbs

I'm currently looking into the issue. I was testing and found this error. Don't know what caused it. Get back soon.

I've fixed this issue.
Fixed: cmdadd would set ClickType to null by default and when you don't use '--t clickType' it would throw null.

Download Link: https://drive.google.com/open?id=0B2DinQ8zWpStY1Atb2xXMWcyT2M