I am using ArcGIS 10.7.1 and when I go to add Data the Dialog box is blank. I can open Catalog and see the linked data sources. I can even get to Catalog from the Icon on the top of the Add Data dialog box.
I should also mention I can drag a layer from its source and drop it on the map, but the Add Data dialog is always blank from where ever I access it.
Any help is greatly appreciated.
