Arena SC crashes me back to character screen

[Dametrius]

When I queue for the Sac Arena, it takes me back to the character screen. I hit my character to go back in, and it goes right back to the character selection screen.
After the SC ends, it dumps me back out to IC but my interface will not load. I have to kill the application with Task Manager to go back into game.

[Rydiak]

Have you tried the launcher's repair function?