I've been up for a while trying to figure out how to give certain people an admin UI through a server event by being added or deleted from Player UIs. Please help me find out what's wrong here, there isn't an error in studio but in 2 player test servers it says that the UI isn't part of player.

Local Script:

local TextBox = script.Parent.Parent:FindFirstChild("PlayerSelectGui")
local GiveUIEvent = game.ReplicatedStorage.AdminFolder.AdminEvents:WaitForChild("GiveUI")
local InsertedPlayer = TextBox.Text
local LocalPlayer = game.Players.LocalPlayer
script.Parent.MouseButton1Click:Connect(function()
	InsertedPlayer = TextBox.Text
	print(InsertedPlayer)
	GiveUIEvent:FireServer(InsertedPlayer)
end)

Server Script:

local Players = game:GetService("Players")
local AdminEvents = game.ReplicatedStorage.AdminFolder.AdminEvents
local AdminGui = game.ReplicatedStorage.AdminFolder:WaitForChild("AdminGUI")


AdminEvents.GiveUI.OnServerEvent:Connect(function(plr, InsertedPlayer)
	plr = InsertedPlayer
	if (game.workspace:FindFirstChild(plr) ~= nil) then
		print("plr Found")
		if (game.workspace[plr]:FindFirstChild("Humanoid") ~= nil) then
			print("plr Humanoid Found")
			if not (game.Players[plr].PlayerGui.AdminPanel) then
				local AdminPanel = AdminGui:Clone()
				AdminPanel.Name = "AdminPanel"
				AdminPanel.Parent = plr.PlayerGui
				AdminPanel.Enabled = true
			else
				print("Player has admin")
			end
		end
	end
end)
Anonymous