League update, reopen and says i need to update it again.

So, it happens with both PBE and the league app, the client says me i need to update the app, i click on "restart", and when it reopen i need to do the update again, again and again. I can't play. More precisely, they say they need to restore it to an older version of it, but it never stops. I think, re downloading it would work, but i need 1 hour to finish the downloading, and I don't wanna wait every time this happens