Everything works fine in this script. But it does not clone to the players GUI?

So what I am trying to do is, if a admin speaks and says ":givescoreboard (name)" then it would see if that name is valid. But for some reason it does not clone the GUI to the person. Why is that?

local admins = {"dogovpain","RandamuHaise","Player1","6trxshankles9","RoberttOriginal"}
local scoreboardValues = game.Workspace.ScoreboardValues

game.Players.PlayerAdded:Connect(function(plr)
	plr.Chatted:Connect(function(msg)
		if msg:sub(1, 16) == ":givescoreboard " then
	    for i = 1,#admins do
		if plr.Name == admins[i] then
		local addPlayer = msg:sub(17, msg:len())	
		print(addPlayer)
		if game.Players:FindFirstChild(addPlayer) then
			print("Player has been found")
			table.insert(admins, addPlayer)
			for i,v in pairs(game.Players:GetPlayers()) do
				if v.Name == admins[i] then
					if v.PlayerGui:FindFirstChild("ManualGui") then
					v.PlayerGui:FindFirstChild("ManualGUI"):Destroy() 
					wait()
					local manual = script.ManualGUI:Clone()
					manual.Parent = v.PlayerGui
				end
				end
				end
		else 
			print("Player has not been found")
			    end
	  		 end
		  end
	   end
	end)
end)

game.Players.PlayerAdded:Connect(function(player)
	local playerGui = player.PlayerGui
	for i = 1,#admins do
		if player.Name == admins[i] then
			local manualGui = script:WaitForChild("ManualGUI")
			local cloneGuiToPlayer = manualGui:Clone()
			cloneGuiToPlayer.Parent = playerGui
			if playerGui:FindFirstChild("ManualGUI") then return end
		end
	end
end)

server

event:FireClient(player)

client

event.OnClientEvent:Connect(function()
	frame.Visible = true
end)