Resolution Issue!! play

So I have been playing this game for about 2 and half year now and never had faced this problem before, but something happened and now my monitor won't let me view anything that is happening after I start a game in league not even the loading screen but I can still see the client(this started after the 9.14 patch upgrade too, idk if that has anything to do with it). And this is only happening with league, I tried playing other games and I can still see it perfectly. I tried to search up solutions and it all said to update driver software for my display adapters(aka my graphic card) and Monitors(i have a generic non-pnp monitor) but both of them were up-to-date. So i was wondering if someone else had faced this problem before and know how to solve it.