table expected got nil error?

while true do
	wait()
repeat wait() until workspace.Values.Classic.Value == true 
for i,z in pairs (_G.Playing) do 
	if z.Character.Humanoid then
			z.Character.Humanoid.Died:connect(function() -- identifying if the character dies
				for i,v in pairs (_G.Players) do -----------------------errors right here..
					if v.Name == z.Name then -- making sure that this player died is a member of table
				print(z.Character.Name..' has died')
						table.remove(_G.Playing, i) -- removes from table
						print(i,z)
						break
					end
					end
			end)
	else
		return error('No player found in the table _G.Playing!')
			end
end
end

I basically explained it in the table but this script is SUPPOSE to wait until a character died from the table _G.Playing then removes it so that another script can verify id the table only has 1 player, and yes i inserted the player into the table not the player's name..