check your network
When I wanted to start an game of league of legends I couldn't , evry time it said to check my internet and I check my internet,it was ok then I try agaian and again for 8 times , of corse my team ff and I got5 games 20 mins leave buster,im very annoyed, I didn't do anything , just log in the account , play the match making, got Into the loading screen then an error . And because of this error my promos failed once again, maybe that game was my lucky one and could win to get to the next division …. this same bug happened to an other player in my team that couldn't get into the game !! its so frustrating [zombie-nunu-tears]