Game crashes on loading[CLIENT]

For the past 3-4 games in a row(Sometimes I can play but others I just cant) I've tried to play I get into champ select just fine then when the game launches it just crashes and I go back to the client and it says to reconnect and I click it like 5 times nothing changes, I relaunch league nothing changes, I just wanna play ranked and Im probably going to get a timer because of the bug. I've never had this bug up until about 3-4 days ago but I also have Avast