Why is the Parent attribute of this Folder expecting a string not an Instance?

invalid argument #2 (string expected, got Instance)

On line 6

Server script

game.ReplicatedStorage.clientPipeline.Broadcast.openBroadcast.OnServerInvoke = function(player, Id)
	local broadcasts = game.ServerStorage.broadcasts:GetChildren()
	for i=1,#broadcasts do
		if broadcasts[i].Id.Value == Id then
			local x = broadcasts[i]:Clone()
			x.Parent = game.Players[player].PlayerScripts.connectedTo
		end
	end
	return
end

You'd think I would've encountered this error before, especially as its with something as basic as parents, but I haven't and don't know why it wants a string or even why its says argument #2 when there's only one argument.

Any ideas on whats going on?