A good place to start is RStudio's trouble shooting guide. I'm not totally sure I follow the description of the issue, but I suspect the guide marked "RStudio desktop will not start".
Failing this advice, knowing a bit more about your system would be helpful
[details="System information"]
Upload a diagnostics report and the output from the associated terminal session to a service like Gist and include the link.
Error information
- General description
- The output of
RStudio.Version()
- Error messages
- Log files (See here)
- Crash Report (See here)
- Attempted steps taken to fix
- Have you successfully launched RStudio in the past?[/details]
That being said, I've seen the following two support docs cited as solutions to that blank white screen issue on RStudio Desktop start up.