I've successfully got the library creating the list and alphabetizing it. I've encountered some new problems now.
If I add a UIScrollView to the parent object (temp_library) and a UIDragScrollView to the prefab that makes up the list items, I get the following error, after which nothing spawns:
"You can't place widgets on a layer different than the UIPanel that manages them.
If you want to move widgets to a different layer, parent them to a new panel instead."
I assumed this meant the depth of the objects, but that can't be the case because I have plenty of other objects all spawning on different layers, so I don't understand this error.