When working in RStudio (R 3.5.3), it randomly freezes and the screen turns all-white (with menus visible, but unresponsive). I can't exit and have to end the task via task manager. I've tried uninstalling and reinstalling as an administrator and normal user, which was suggested on a few other posts, but that does not seem to fix the problem. It's insanely frustrating! Any idea what the problem could be?