Remove ADT Smartthings Hub from Account

I am trying to move my ADT Smartthings Hub to a new location as I have two hubs and it never worked well on the same location. I reset the hub via battery reset via Samsung’s instructions, but forgot to remove it from the devices first. When I try to remove the Hub via the IDE, I get:

Oh No! Something Went Wrong!

500: Internal Server Error

Is there still Smartthings email support for helping me on this? Now I am stuck with a hub that won’t connect and won’t register