Logged on to my computer this morning and now all of a sudden I cannot add fields to my attribute table in ArcPro. All edits are saved and turned off. When I click the add field button, there is a very quick flash at the bottom of the attribute table (like its trying) but then nothing happens. The same thing is happening for all layers in all of my ArcPro projects. Does anyone have an idea what's causing this? Using Windows 7 professional.