..."instance is not a valid member of"...?

i'm creating a paper morph GUI with a remote function that will send the name of the button clicked to the server, and it will use that information to clone the correct morph and weld to the player. i'm pretty new at scripting and this is the most advanced thing i've taken on so far, so its probably messy i know.

localscript:

script.Parent.MouseButton1Click:connect(function()

local ReplicatedStorage = game:GetService("ReplicatedStorage")
local morph = ReplicatedStorage:WaitForChild("Morph")

local img = script.Parent.Name

morph:InvokeServer(img)
print("decal id: ",img)

end)

server script:

ReplicatedStorage = game:GetService("ReplicatedStorage")

function morphPlayer(player,img)
        print("decal id recieved: "..img)

    if player.Character:findFirstChild("Humanoid") ~= nil then

        --===
        local morph = game.ServerStorage.Morphs.img
        --===

        local chest = game.ServerStorage.Morphs.morphvalue.Chest:clone()
        chest.Parent = player.Character

        local a = player.Character:GetChildren() 
        for i=1, #a do 
            if (a[i].className == "Part") then 
                a[i].Transparency = 1 
        local b = player.Character:GetChildren() 
        for i=1, #b do 
            if (b[i].className == "Accessory") then 
                b[i]:remove()
            end

        local children = chest:GetChildren()
        for i=1, #children do
            if children[i].className == "Part" then
                local W     = Instance.new("Weld")
                W.Part0     = chest.Middle
                W.Part1     = children[i]
                local CJ    = CFrame.new(chest.Middle.Position)
                local C0    = chest.Middle.CFrame:inverse()*CJ
                local C1    = children[i].CFrame:inverse()*CJ
                W.C0 = C0
                W.C1 = C1
                W.Parent = chest.Middle
            end
                local Y     = Instance.new("Weld")
                Y.Part0     = player.Character.Torso
                Y.Part1     = chest.Middle
                Y.C0        = CFrame.new(0, 0, 0)
                Y.Parent    = Y.Part0
        end

        local child = chest:GetChildren()
        for i = 1, # child do
            if  child[i].className  == "Part" then
                child[i].Anchored   = false
                child[i].CanCollide = false
                        end
                    end
                end
            end
        end
    end
end
ReplicatedStorage.Morph.OnServerInvoke = morphPlayer

THE ERRORS ARE: img is not a valid member of Folder - localscript line 8

img is not a valid member of Folder - serverscript line 9

when it prints in the output, the name is correct, so I don't know what to do here