Clone a GUI to PlayerGUI when they kill a NPC not working, why?

When the NPC dies it tags the player that is responsible for the NPCs death but it isn't working. Can someone please help me! I've tried for hours but I'm still not able to find a solution to this.

Script:

local playerHumanoid = script.Parent.Humanoid;
local function npcKilled()
    local tag = playerHumanoid:FindFirstChild("creator");
    if(tag) and (tag.Value) ~= nil then
        local moveTo = game.Players[tag.Value]:FindFirstChild("PlayerGui") 
        if(moveTo) then
            local cloneGui = script.KillnoteGui:Clone();
            cloneGui.Parent = moveTo;
            wait(0.1)
            script:Destroy();
        end
    end
end

playerHumanoid.Died:connect(npcKilled);