Is this a JSON error or not?

function NewGroup(Child)
GroupStuff=game:GetService("HttpService"):GetAsync("http://api.roblox.com/Groups/"..Child.Value) --when the number value of a group is added
script.String.Value=tostring(GroupStuff[1]) --String is a stringvalue inside the script
end

script.ChildAdded:connect(NewGroup)  --connects when a number value is added

So I tried out this script and it gives me the error: "trust check failed for http://api.roblox.com/Groups/692110"

When you go to the link of a group, it gives you an output that looks like this: {"Name":"Control RTS","Id":1052407,"Owner":{"Name":"Rovien","Id":1579768},"EmblemUrl":"http://www.roblox.com/asset/?id=172090617","Description":"? Game Page ?\r\nLink to Control's game page:\r\nhttp://www.roblox.com/--place?id=93139508\r\n\r\n? Trello Board ?\r\nCheck for upcoming features and bug fixes:\r\nhttps://trello.com/b/aYlSNnfv/control\r\n\r\n? Unofficial Wiki ?\r\nCheck for general documentation on the game:\r\nhttp://controlrts.wikia.com/wiki/ControlRTS_Wiki","Roles":[{"Name":"General Populus","Rank":5},{"Name":"Main Players","Rank":150},{"Name":"Admins","Rank":222},{"Name":"Developers","Rank":254},{"Name":"Group Holder","Rank":255}]}

I just need to grab the first part, but I am not entirely sure what is the problem. I have tried modifying the function like so:

function NewGroup(Child)
GroupStuff=game:GetService("HttpService"):GetAsync("http://api.roblox.com/Groups/"..Child.Value)
local Utils = assert(LoadLibrary("RbxUtility")) 
local JSON = Utils.DecodeJSON(GroupStuff)
game.Workspace.GroupNameGet.String.Value=tostring(JSON[1])
end

script.ChildAdded:connect(NewGroup)

Please help! I have been stuck on this for days and tried everything I can.