Maestro crashing

if I'm in a game of league already it will only minimize the screen and I can re-maximize the league window and nothing will happen as long as I don't acknowledge the error pop up.

http://s78.photobucket.com/user/Trippinshrumes/media/League%20error.png.html

Now I have all this wait time to play games and I can only pray I get in one before whatever this is errors out.

basically the error on the right screen will pop up, I just moved it over so both screens could be fully seen. Thanks!