game crash on multiplayer screen

Put the summary of the bug you're having here
i went to the multiplayer tab and then clicked on the full screen the game crashed.
What I expected to happen was the game to go into full screen
Describe what you thought should happen here
i thought the game should have gone into full screen
What actually happened was...:
the game crashed
Steps to Reproduce:
i don't remeber how to make it happen again.