Root and Torso disconnect from the body on tween?

Alright so im working on a reverse horror game that i need a grapple script for. So i got it working but i cant get the character to move. It just disconnects. I have tried everything so this is my last resort.

No errors btw.

 local player = game.Players.LocalPlayer

local character = player.Character
local arm = character:WaitForChild("Right Arm")

local root = character:WaitForChild("HumanoidRootPart")

local mouse = player:GetMouse()

local a0 = Instance.new("Attachment")
local a1 = Instance.new("Attachment")
local rope = Instance.new("RopeConstraint")

mouse.Button1Up:Connect(function()
	a0.Parent = arm
	a1.Parent = workspace.Terrain
	a1.Position = mouse.hit.p
	rope.Attachment0 = a0
	rope.Attachment1 = a1
	rope.Parent = workspace
	rope.Visible = true
	local Info = TweenInfo.new(1,Enum.EasingStyle.Circular,Enum.EasingDirection.In,0,false,0)
	local Goal = {Position = mouse.hit.p} -- getting it to the position 
	local Tween = game:GetService("TweenService"):Create(root,Info,Goal) -- the tween
	Tween:Play() -- playing it
end)