Try creating a new project in an empty folder in the root directory (C:).
This is wild speculation on my part, but the thing which seems most reasonable to me is either in the file path to your working directory or in one of the file names in that directory, you have some kind of non-standard character which is causing R Studio to crash when it attempts to render the pane.
Again, that is just speculation, but the easiest way to start debugging it is to simplify the situation and eliminate as many possible causes as possible.
If it still throws an error when you try to view the contents of an empty folder on the C: drive, it might be some kind of permission issue or possibly some overactive anti-malware pitching a fit about R Studio accessing the filesystem.
Beyond that I'm hesitant to guess.