attempt to call nil in an i,v loop?

it keeps coming up with this error: 10:45:33.739 - ServerScriptService.ModuleScript:13: attempt to call a nil value

This is inside a module script and they say the problem is in line 13

local players = {}

local floor = workspace.Floor
local frame = floor.BillboardGui.Frame
local timet = frame.TimeT
local p1
local p2
local t1 = frame.Player1
local t2 = frame.Player2

local function setPlayers()
	if(p1 == nil)then
		for i,v in pairs(players:GetChildren())do
			if(v.TeamColor == BrickColor.new("Really red"))then
				p1 = v
			end
		end
		
		setPlayers()
	elseif(p1 and p2 == nil)then
		for i,v in pairs(players:GetChildren())do
			if(v.TeamColor == BrickColor.new("Really blue"))then
				p2 = v
			end
		end
	end	
end

local function updatePlayers()
	for i,v in pairs(game.Players:GetChildren())do
		table.insert(players, v)
	end
	setPlayers()
end

return function()
	local function core()
		if not(#players == 1)then
			updatePlayers()
		
			t1.Text = p1.Name
			t2.Text = p2.Name
			
			frame.Parent.Enabled = true
			
			for i=10, 0, -1 do
				local stringConversion = tostring(i)
				timet = stringConversion
				wait(1)
			end
		
			timet.Text = "10"
			frame.Parent.Enabled = false
			
			p1.Character.HumanoidRootPart.Position = Vector3.new(math.random(-15.5, 15.5), 21.5, math.random(-15.5, 15.5))
			p2.Character.HumanoidRootPart.Position = Vector3.new(math.random(-15.5, 15.5), 21.5, math.random(-15.5, 15.5))
			
			p1.Character.Died:Connect(function()
				table.remove(players, p2)
				p1.Character.Humanoid.Health = 0
				p2.Character.Humanoid.Health = 0
				core()
			end)
			
			p2.Character.Died:Connect(function()
				table.remove(players, p1)
				p2.Character.Humanoid.Health = 0
				p1.Character.Humanoid.Health = 0
				core()
			end)
		else
			print("done lol")
		end
	end
	
	core()
end