SpectateGui Attempt to index local 'player' (a nil value)?

local players = nil
local number = 0
local maxnumber = 0
local player = game.Players.LocalPlayer
script.Parent.Parent:WaitForChild("PlayerInfo"):WaitForChild("pName")

script.Parent.Next.MouseButton1Click:connect(function(right)
	players = game.Players:GetChildren()
	maxnumber = #players+1
	number = (number + 1) % maxnumber
	if number == 0 then
		number = number+1
	end
	if players[number] ~= nil then
		script.Parent.Parent.PlayerInfo.Visible = true
		game.Workspace.CurrentCamera.CameraSubject = players[number].Character.Humanoid
		script.Parent.Parent.PlayerInfo:WaitForChild('pName').Text = players[number].Name
		coroutine.resume(coroutine.create(function()
			players[number].Character.Humanoid.Changed:connect(function()
				print(number)
				if players[number].Character.Humanoid.Health < 1 then
					number = (number - 1) % maxnumber
					if number == 0 then
						number = number+1
					end
				end
				if script.Parent.PlayerName.Text == players[number].Name then
					script.Parent.Parent.PlayerInfo.Health.Text = math.floor(players[number].Character.Humanoid.Health)
					if players[number].Character.Humanoid.Health > 100 then
						script.Parent.Parent.PlayerInfo.Bar.BackgroundColor3 = Color3.new(0, 108/255, 191/255)
						spawn(function()
							if players[number].Character.Humanoid.Health < 120 then
								script.Parent.Parent.PlayerInfo.Health.Text = math.floor(players[number].Character.Humanoid.Health)
								script.Parent.Parent.PlayerInfo.Bar.BackgroundColor3 = Color3.new(0, 191/255, 0)
							end
						end)
					end
					script.Parent.Parent.PlayerInfo.Bar.Size = UDim2.new(players[number].Character.Humanoid.Health/players[number].Character.Humanoid.MaxHealth,0,.99,0)
				end
			end)
		end))
		if players[number].Name ~= player.Name then
			script.Parent.PlayerName.Text = players[number].Name
		else 
			script.Parent.Parent.PlayerInfo.Visible = false
			script.Parent.PlayerName.Text = "Nobody"
		end
	elseif players[number] == nil then
		number = 1
		game.Workspace.CurrentCamera.CameraSubject = players[number].Character.Humanoid
		if players[number].Name ~= player.Name then
			script.Parent.PlayerName.Text = players[number].Name
		else 
			script.Parent.Parent.PlayerInfo.Visible = false
			script.Parent.PlayerName.Text = "Nobody"
		end
	end
end)

script.Parent.Previous.MouseButton1Click:connect(function(left)
	players = game.Players:GetChildren()
	maxnumber = #players+1
	number = number - 1
	if number == 0 then
		number = maxnumber
	end
	if players[number] ~= nil then
		script.Parent.Parent.PlayerInfo.Visible = true
		game.Workspace.CurrentCamera.CameraSubject = players[number].Character.Humanoid
		script.Parent.Parent.PlayerInfo:WaitForChild('pName').Text = players[number].Name
		coroutine.resume(coroutine.create(function()
			
			players[number].Character.Humanoid.Changed:connect(function()
				if players[number].Character.Humanoid.Health < 1 then
					number = (number + 1) % maxnumber
					if number == 0 then
						number = number+1
					end
				end
				if script.Parent.PlayerName.Text == players[number].Name then
					script.Parent.Parent.PlayerInfo.Health.Text = math.floor(players[number].Character.Humanoid.Health)
					if players[number].Character.Humanoid.Health > 100 then
						script.Parent.Parent.PlayerInfo.Bar.BackgroundColor3 = Color3.new(0, 108/255, 191/255)
						spawn(function()
							if players[number].Character.Humanoid.Health < 101 then
								script.Parent.Parent.PlayerInfo.Health.Text = math.floor(players[number].Character.Humanoid.Health)
								script.Parent.Parent.PlayerInfo.Bar.BackgroundColor3 = Color3.new(0, 191/255, 0)
							end
						end)
					end
					script.Parent.Parent.PlayerInfo.Bar.Size = UDim2.new(players[number].Character.Humanoid.Health/players[number].Character.Humanoid.MaxHealth,0,.99,0)
				end
			end)
		end))
		if players[number].Name ~= player.Name then
		script.Parent.Parent.PlayerInfo.Visible = true
			script.Parent.PlayerName.Text = players[number].Name
		else 
			script.Parent.Parent.PlayerInfo.Visible = false
			script.Parent.PlayerName.Text = "Nobody"
		end
	elseif players[number] == nil then
		number = maxnumber
		game.Workspace.CurrentCamera.CameraSubject = players[number].Character.Humanoid
		if players[number].Name ~= player.Name then
			script.Parent.PlayerName.Text = players[number].Name
		else 
			script.Parent.Parent.PlayerInfo.Visible = false
			script.Parent.PlayerName.Text = "Nobody"
		end
	end
end)

--[[script.Parent.Parent.SpectateButton.Spectate.MouseButton1Down:connect(function(click)
	if script.Parent.Parent.Active.Value == false then
		script.Parent.Parent.Active.Value = true
		script.Parent.Parent.ChangePlayer.Visible = true
	elseif script.Parent.Parent.Active.Value == true then
		script.Parent.Parent.Active.Value = false
		script.Parent.Parent.ChangePlayer.Visible = false
		script.Parent.PlayerName.Text = "Nobody"
		number = 1
		game.Workspace.CurrentCamera.CameraSubject = game.Players.LocalPlayer.Character.Humanoid
	end
end)]]