Can anyone help me figure out why FindFirstChild always returns nil?

local folder = game.Workspace:FindFirstChild("Invisiblity Folder")
    if folder==nil then
        newfolder = Instance.new("Folder")
        newfolder.Parent=game.Workspace
        newfolder.Name="Invisibility Folder"
        print("made folder")
    else
            print("folder here")
    end

It creates a brand new folder everytime I run this code, even if a folder is already in the workspace. Anyone understand why? Running from a Server-Side script.