Good day ! I am an independent adviser here to help you!
We may need more info on this. What exactly is blank? Have you tried anything yet?
May try the following:
- Close everything running in the background
- Run game as admin
- What GPU drivers do you have? Depending on this, try to reinstall your GPU drivers based on which GPU you have.
- Go to the .exe file of the game and right click > properties > Disable fullscreen optimizations
- Uninstall and reinstall roblox entirely.