Whole worksheet turns white and pages are stacked vertically

So i'm recently having a problem with one particular project. All of a sudden all my pages are stacked vertically and my background is fully white. I tried changing the background colour in "preferences" and tried to change the horizontal/vertical settings but the preferences settings don't change anything. I tried reinstalling musescore but that doesn't change anything either, which means the issue is within this particular project. When I open another part within this project, the background is dark blue a usual and the pages are stacked horizontally. It's very annoying and I don't know what to do. Has anyone ever had this issue before, or might know how to help me?