Trying to weld a part to the camera. What is wrong with my code?

local block = Instance.new("Part")
block.Parent = game.Workspace
block.Name = "block"
block.Shape = Enum.PartType.Block
block.CanCollide = false
block.Size = Vector3.new(0.3, 0.3, 0.3)
game:GetService("RunService").RenderStepped:connect(function()
	block.LocalTransparencyModifier = 0.4
end)

local Weld = Instance.new("Weld", block)
Weld.Part0 = game.Workspace.CurrentCamera
Weld.Part1 = block
Weld.C0 = CFrame.new(0,0,1)  

thanks for your help.

Simple enough. The Camera class does not inherit BasePart, so you cannot assign it to your weld's Part0 or Part1 property.