Ply = {}
Ply.Frozen = false

function FreezePlayer(Player, Command, Args)
	if !Player:IsAdmin() then
		Player:PrintMessage(HUD_PRINTTALK, "You're not an admin!")
	else
		if #Args > 0 then
			for _, v in pairs(player.GetAll()) do
				if v:Nick() == Args[1] then
					if Ply[v].Frozen == false then --This gives me the error "autorun/server/init.lua:26: attempt to index field '?' (a nil value)".
						v:Freeze(true)
						Ply[v].Frozen = true
					else
						v:Freeze(false)
						Ply[v].Frozen = false
					end
				end
			end
		end
	end
end