Attempt to index local 'location' (a nil value)?

function module.teleport(plr, location)	
	local registered = split(script.Registered.Value, ",")
	
	local exists = false
	
	for _,i in pairs(registered) do
		if exists ~= true then
			exists = i == location
		end
	end
	
	print(exists)
	
	if exists then
		location = registered[location]
		local position
		
	    if location:IsA("BasePart") then
			position = location.Position
		else
			error("Models are not supported as a viable LocationPart. Use a BasePart instead.")
			return
		end
		
		if plr:IsA("Model") and plr.Parent == workspace and game.Players:FindFirstChild(plr.Name) then
			plr:MoveTo(position)
		else
			error("You did not provide a valid object. Valid objects must be a child of game.Workspace, must be a model, and must have a counterpart in game.Players.")
			return
		end
		
	else
		error("LocationPart \""..location.."\" does not exist.")
		return
	end
end

This code keeps giving an error and I just can't seem to find out the issue:

true

15:03:24.186 - ServerScriptService.TeleService:47: attempt to index local 'location' (a nil value)
15:03:24.187 - Stack Begin
15:03:24.187 - Script 'ServerScriptService.TeleService', Line 47 - field teleport
15:03:24.188 - Script 'ServerScriptService.TeleService', Line 74
15:03:24.188 - Stack End