session closed!!!!

i was in promotion 3 games for promovating to division bronze 2 to bronze 1 i had 1 victory and 1 defeat and when i was in champion selection, an error appeared and said that LoL needs to be closed i "hit" OK and got me out of the game...when i logged in again i had a message that the session i was in for promovation was closed for inactivity what should i do? pls help! :(((