Honeywell Vista20P and Smarthings

Hi Guys,

I had my system working on v1 hub and now having issues with my v2 hub. I basically can connect to my local Envisalink3 device but when I follow these instructions to get a token from smarthings

I get an error

Oh No! Something Went Wrong!
500: Internal Server Error
Reference Id
Sat Apr 02 23:32:16 UTC 2016

Any idea why this is happening and how can I resolve this? Once this is done, my Honeywell system will show up in my panel easily!