When I open any file in photoshop 2020 it just shows a white page. The image is in the little window on the Layers panel but noting on the actual page. I have rulers on and when I drag a new guide out it also doesn't show. I'm thinking there is a setting somewhere that got changed when it updated to 2020 but I have no clue what that setting would be. You can see in the picture below the artboard is all white and my channels are turned on. My Layers are also turned on. when I turn them on and off it does nothing.