How would i fix my game Tag Script?

function Choose()
	local players = game.Players:GetChildren()
	local RandomPlayer = players[math.random(1, #players)]
	game.Workspace.IT.Value = RandomPlayer.Name
	wait(3)
	local weld = Instance.new("Weld")
	local Player = game.Workspace:WaitForChild(RandomPlayer.Name)
	local Torso = Player:WaitForChild("Torso")
	Scr = game.Workspace.Tag:Clone()
	weld.Parent = Scr
	weld.Part0 = Torso
	weld.Part1 = Scr
	Scr.Parent = Torso
	Scr.CFrame =CFrame.new(Torso.CFrame.X,Torso.CFrame.Y,Torso.CFrame.Z)
	
	
end

while game.Workspace.Play.Value == false do
	local Pl = game.Workspace:FindFirstChild(game.Workspace.IT.Value)
	local Torso = Pl:WaitForChild("Torso")
	game.Workspace.Play.Value = true
	wait(3)
	Choose()
	
	
	
	
	wait(20)
	Torso.Tag:Remove()
	game.Workspace.IT.Value = ""
	game.Workspace.Play.Value = false
	
	
	
	
	
end

Output

I have arrived. Waiting for ... CoreScripts/BackpackScripts/BackpackManager BackpackOpenEvent Waiting for ... CoreScripts/BackpackScripts/BackpackManager BackpackCloseEvent Waiting for ... CoreScripts/BackpackScripts/BackpackManager TabClickedEvent Waiting for ... CoreScripts/BackpackScripts/BackpackManager SearchRequestedEvent Waiting for ... CoreScripts/BackpackScripts/BackpackManager BackpackReady Waiting for ... CoreScripts/BackpackScripts/BackpackManager BackpackReady 18:10:44.088 - Auto-Saving... 18:10:44.514 - Unable to load plugin icon. Image may have an invalid or unknown format. 18:10:44.524 - Unable to load plugin icon. Image may have an invalid or unknown format. 18:10:45.661 - Workspace.Brain:26: attempt to index local 'Pl' (a nil value) 18:10:45.662 - Script 'Workspace.Brain', Line 26 18:10:45.662 - stack end logging probability 0.3267616809595 not logging Alerted Gui Maker Plugin loaded 18:11:21.563 - Auto-Saving...

This is my current code as follows please offer suggestions... basicly what im trying to do is have a loop that only runs when i want to and when the loop is true it fires the function that chooses the player

What is output?

function Choose()
	local players = game.Players:GetChildren()
	local RandomPlayer = players[math.random(1, #players)]
	game.Workspace.IT.Value = RandomPlayer.Name
	wait(3)
	local weld = Instance.new("Weld")
	local Player = game.Workspace:WaitForChild(RandomPlayer.Name)
	local Torso = Player:WaitForChild("Torso")
	Scr = game.Workspace.Tag:Clone()
	weld.Parent = Scr
	weld.Part0 = Torso
	weld.Part1 = Scr
	Scr.Parent = Torso
	Scr.CFrame =CFrame.new(Torso.CFrame.X,Torso.CFrame.Y,Torso.CFrame.Z)
end

while game.Workspace.Play.Value == false do
	local Pl = game.Workspace:FindFirstChild(game.Workspace.IT.Value)
	if Pl then
		local Torso = Pl:WaitForChild("Torso")
		game.Workspace.Play.Value = true
		wait(3)
		Choose()
		wait(20)
		Torso.Tag:Remove()
		game.Workspace.IT.Value = ""
		game.Workspace.Play.Value = false
	else
		print("NO IT")
	end
end

The error was probably because Pl was nil. You tried to call a method of something that doesn't even exist. So, you need to have the code check if Pl exists, and if it does, continue.