Just yesterday I was trying to reference one of my existing vectorworks file into a blank file. Usually it would display the reference window with the available layers and check boxes of auto updating your references, but this time it only showed the check boxes and when I confirmed everything, nothing showed up. Then suddenly it fixed itself, but then when I was walking someone else through their vectorworks on referencing the file, the same issue happened. BUT the strangest thing was that the layers ended up showing up with the classes but there was still blank, even in the resource manager. I'm currently working on windows and my friend is working on a mac.