[SOLVED] I'm making a gun for my game. But the transparency breaks in game?

Hi. I'm trying to make a gun(The gun is a mesh) for my game But for some reason my code breaks in game. I'm using the collection service and the run service to detect if a players humanoidrootpart has the tag "D". It works in studio but in game it just breaks??

The error i get is this!

Error:

Players.Herobrinekid1.PlayerGui.LocalScript:69: attempt to index nil with 'Transparency'

And here is my code(In a Localscript by the way):

Code:

game:GetService("RunService").RenderStepped:Connect(function()
    if Gunme ~= nil then
        if Collectionse:HasTag(Player.Character.HumanoidRootPart, "D") then
            Gunme.Transparency = 0
        else
            Gunme.Transparency = 1
        end
    end
end)