What is wrong with this part of the script?

I had an error on this script, but I don't know what is wrong with it. This is the part where it had an error:

            local randomspawn = lobbyspawns[math.random(1, #lobbyspawns)]
            player.Character:MoveTo(randomspawn.Position)

            local backpack = player:FindFirstChild("Backpack")
            if backpack then
                backpack:ClearAllChildren()
            end
        end
    end
    killer = nil
    sheriff = nil

This is the error:

18:27:57.937 - ServerScriptService.MainScript:458: bad argument #2 to 'random' (interval is empty)
18:27:57.939 - Script 'ServerScriptService.MainScript', Line 458
18:27:57.941 - Stack End