Plz help , im getting an error when i want to reconnect to a game

So , pretty much i went into ARAM game , after the champ select i didnt even see the loading screen , and it gave me an error ´´A critical error has occured and has to be terminated´´ and that i need to create a crash dump or something , can someone help me please? Edit : im posting this into report a bug cuz im pretty sure it IS a bug , it wasnt doing it before , just in this patch its happening