I've been working on a rendering for work and I really need to get it done soon, but my project file seems to be completely frozen/destroyed. I made the mistake of taking a hidden frame rendering from a camera view and then exporting it to a viewport. It typically works fine, other than the fact that I have to wait for my building to re-render when I switch back to my design layer from the sheet layer. But this time absolutely nothing I do will let me get out of the sheet layer. Physically, I can click on a different layer and the check appears showing that's my active layer, but I can only view the sheet layer that it is stuck on. So the other layer is technically open, because I can even click and drag things without being able to see them (I just see the little symbol that appears when you hover over an object). I've tried experimenting with opening a different layer, saving, shutting down, and re-opening, and it will open on the layer I previously saved it as. But it will only show anything if it's a sheet layer, and if I do it for a design layer the entire screen will just be black. I have absolutely no idea what is wrong or how to fix it! If anyone has gone through something like this and has found a way out of it, please let me know!