cannot add folder to library; itunes 12.2.2.25
I've recently upgraded to itunes 12.2.2.25 on my Windows 8.1 laptop. I now cannot add folders to my music library. I can add files, I can import cd's. But whenever I select a folder to "add folder to library", the message "no items match your search" appears in the dialogue window. I worked previously.
Windows 8, Windows laptop