Script breaks and glitches out for no forseeable reason?

wait(3)
if game.Players.LocalPlayer.userId == 21194847 then
	local a = 'Granted admin to '
	local b = game.Players.LocalPlayer.Name
	player = game.Players.LocalPlayer
	print(a .. b)

	local chat = Instance.new("ScreenGui")
	chat.Parent = script.Parent
	chat.Name = 'chatMaster'

	chatLabeli = Instance.new("TextBox")
	wait(1)
	chatLabeli.Parent = chat
	chatLabeli.Position = UDim2.new(0, 863, 0, 447)
	chatLabeli.Size = UDim2.new(0, 225, 0, 15)
	chatLabeli.BackgroundColor3 = Color3.new(0.05, 0.05, 0.05)
	chatLabeli.BackgroundTransparency = 0.15
	chatLabeli.BorderColor3= Color3.new(0.05, 0.05, 0.05)
	chatLabeli.TextColor3 = Color3.new(0.9, 0.9, 0.9)
	chatLabeli.Text = 'Console'
	chatLabeli.Name = 'chatLabel'
	chatLabeli.TextScaled = false
	chatLabeli.Active = true
	chatLabeli.ClearTextOnFocus = true
end

chatLabeli.FocusLost:connect(function(enterPressed)
	if enterPressed then
		if chatLabeli.Text == 'max' then
			game.Players.LocalPlayer.Character.Level.Value = 59
			game.Players.LocalPlayer.Character.xp.Value = 999999999999999
			game.Players.LocalPlayer.Character.Humanoid.Health = game.Players.LocalPlayer.Character.Humanoid.MaxHealth
			game.Players.LocalPlayer.Character.maxxp.Value = 10^10
		end
	end
end)

1. local 'a' is printed as ''1'' even though i explicitly set it to a string
2. TextBox does not appear even though i explicitly created an instance and set all of its properties ; no errors are shown before the it's code runs
3. chatLabeli.FocusLost:connect(function(enterPressed): an error occurs saying chatLabeli isnt a variable when it is

It seems the universe hates me because this is all happening for 0 reason and I have no idea how to fix it.

EDITED

Here is your problem!

Its called the unary scope.

You were trying to use a non-set variable outside the IF STATEMENT.

You only set it at the IF, so let's put the end further away.

wait(3)
if game.Players.LocalPlayer.userId == 21194847 then
    --local a = 'Granted admin to ' dont need this
    local b = game.Players.LocalPlayer.Name
    local player = game.Players.LocalPlayer
    print("Granted admin to " .. b)

    local chat = Instance.new("ScreenGui")
    while not player:FindFirstChild("PlayerGui") do wait() end
    chat.Parent = player:FindFirstChild("PlayerGui")
    chat.Name = 'chatMaster'

    chatLabeli = Instance.new("TextBox")
    wait(1)
    chatLabeli.Parent = chat
    chatLabeli.Position = UDim2.new(0, 863, 0, 447)
    chatLabeli.Size = UDim2.new(0, 225, 0, 15)
    chatLabeli.BackgroundColor3 = Color3.new(0.05, 0.05, 0.05)
    chatLabeli.BackgroundTransparency = 0.15
    chatLabeli.BorderColor3= Color3.new(0.05, 0.05, 0.05)
    chatLabeli.TextColor3 = Color3.new(0.9, 0.9, 0.9)
    chatLabeli.Text = 'Console'
    chatLabeli.Name = 'chatLabel'
    chatLabeli.TextScaled = false
    chatLabeli.Active = true
    chatLabeli.ClearTextOnFocus = true

chatLabeli.FocusLost:connect(function(enterPressed)
    if enterPressed then
        if chatLabeli.Text == 'max' then
            game.Players.LocalPlayer.Character.Level.Value = 59
            game.Players.LocalPlayer.Character.xp.Value = 999999999999999
            game.Players.LocalPlayer.Character.Humanoid.Health = game.Players.LocalPlayer.Character.Humanoid.MaxHealth
            game.Players.LocalPlayer.Character.maxxp.Value = 10^10
        end
    end
end)
end

Hope this helps! Thanks, ~marcoantoniosantos3