This is an an old issue and there is a work-around, but it continues to throw a wrench into the works for new customers.
When we move our Icon Menu data files and slide libraries to a network folder and we set a redirect in the wd.env file to look for slide library files in the network folder, the software loses its connection to the bitmaps in the AcadE folder, thus the images for the Insert Ladder, Fan-In/Fan-Out, Multiple Bus, etc. dialogs are missing.